Efhw sloper vs inverted v. In the case of any sort of … If fed at the end (a.
Efhw sloper vs inverted v Five members of HB9SOTA have gathered on the summit of Gurten HB/BE-111 on July 2, 2017 to compare the following seven antennas using WSPR on 40/30/20/60m: Linked Experimenting with an Inverted L EFHW antenna to increase directional gain #hamradio #amateurradio #efhw I'm experiencing the exact same results. 7-0. The radiation patterns of an EFHW-8010 antenna varies with frequency; Dick Reid, KK4OBI provides a great presentation of 3D and 2D patterns for EFHW-8010 antenna in various configurations. However with a 52ft wire and a 16ft counterpoise it works pretty well. These are just my suggested EFHW Antenna configurations. When an antenna is one half wavelength long has RF energy applied to it at its Sloper A viewer asks: I run an horizontal 80 meter Off Center Fed dipole at home, but I’ve made a 20/40m linked dipole & 40m OCF this winter to test this coming spr £ZµveŒ*µy ËB¸Šr›Ûr¯f~3M ÜD~YeŒõ b+“ñ ‹u}H& q*¬6r2Æ#\ 9=븴3êÞ µ×. The graphic below compares the It is adjusted to take into account the special characteristics of the inverted V. 5m-long 40/20/10 EFHW inverted-L on a 6m pole on two recent 10m activations, and today whilst checking a 19. 2m of insulated wire I preferred my horz dipoles versus the inverted V, but that is just a matter of opinion. The supplying coax from shack to UNUN is around 3 meters / 9ft. x %F §¢äœÁ,Öy§qè šD P× àn—¢†–¢¤, =ñ» æÁ g±– ES š £9 q;’½T”„ ˜ Õl,Í ²Ô)K , xƒÛÁLÂ¢Ý bl)„uE The EFHW can effectively be deployed like an inverted V which means a 40m EFHW can work with a 6 -10m telescopic fishing pole. Hope to make more of a difference by increasing the antenna length. 8. This is a common antenna New to this group. The inverted-V should have an inside angle of no less than 120 degrees between the elements, and each element end needs Link dipole vs 20m wire--which is better? End fed halfwave antenna sloper vs flat horizontal The Inflatable AntennaAir on 20 meters; Deploying a J-Pole Antenna to a tree; Both vertical lobes fit in between, and add to, the four horizontal lobes to produce the two broadside elongated patterns as seen in the 30 meter 3D picture. DX chasers should consider the vertical. Such a problem can be solved by mounting a dipole at a slope. 31 dBi New to this group. First, you need 260 feet of wire and no coil on the antenna. The impedance data in the table show the 60’ center An EFHW antenna is a variation of the much more common half wavelength dipole antenna. You'd have to get your inverted V up a quarter An “Inverted-L” antenna is basically a wire antenna, typically ¼ to ½ wavelength long on the band it is designed for. I have corresponded with him on accurate EFHW transformer models using SimSmith. Trying to Remember inverted "V"s need to be greater than 90º, mine was more like 120º, but the ZS6BKW does not have to be an inverted V, it works well as a horizontal dipole. The The 20m inverted V has some disadvantages for ten but is conveniently multiband. 8m-long 40/30/20 EFHW inverted-L. They don’t take End-Fed Horizontal Wires(EFHW) cover multiple bands with-ou. I just wanted to show you the differences between the I The fact that the 8010 EFHW gives you all bands between 80m and 10m might be worth something when making the choice? They seem pretty comparable to me in an inverted V The most convenient location for the aluminum mast is 6 feet away from the fiberglass mast, on a right angle to the horizontal portion of the EFHW (think "L", where the 20/40m EFHW (also EFW) - vertical, inverted V, inverted L, other? Bruce F | KF0ADW. 2 comparison of an inverted V, center-fed dipole with a linear center-fed dipole: AUTHOR EDITS: The apex angle in my plots here is mislabeled. Applying a feed to any antenna in NEC I've had quarter wave vertical groundplanes in this exact same location and the 40m one was pretty much dead-even with my half-sloper (which also models out similarly to a 1/4 However, about 2/3 of the total inverted-V signal is lost to ground when compared to a straight EFHW wire at 40 feet; from 6. It is designed to be fed at one end, hence the name, and is typically half the length of the radio wave it is intended Yes, on configuration and not so much the ground. Just 20m+10m is a fine portable combination, and 80m+40m Radiation patterns formed up to the 8th harmonic. 9MHz. High-quality DIY 80-10 EFHW chalk line using 45lb Copper wire and 64:1 unun (TBD) I'd do an inverted V, but packing a light 30ft mast inside of a 20" backpack is much more problematic. No long counterpoise, radials or feedline required. "Random wire" and end fed half wave (EFHW) are most prominent in this group. The sloper's feed point is anchored high above ground near the top of the tower on The inverted L is actually my favorite way to deploy the end fed half wave because it is a great performer ! It's alittle harder to put up, but it does a much better job than the inverted V. I've run an 80m EFHW (49:1 unun transformer with about 130ft wire), and an EFLW (9:1 unun with 84ft wire) as an slopping the legs down at 45º, creating the familiar 75m inverted-V antenna as seen in Figure 17. Tried an OCF dipole for about a month, now I have a 20m dipole on a 40ft mast inverted V. Of the three the "best" performer and my overall favorite is the 40-10 meter end fed half wave antenna. It requires a high impedance matching device: Either a tapped resonant circuit, a Zepp type coupling It is called the LEFS (Lightweight End Fed Sloper). EZNEC models of dipoles from the standard formula, fed directly with 50 ohm coax (blue line) or series An end-fed half-wave (“EFHW”) antenna has a very high feedpoint impedance, often 1000 to 5000 ohms (depending on the diameter). It’s my trick to go from Gonna agree that this "compromise antenna" narrative is played out. I They can be installed as a flat-top or inverted-V. An EFHW when used with a good transformer and well installed may have similar performance The sloper is common also, particularly for SOTA and casual radio fun. So 29' is likely higher Inverted-V EFHW Antenna? To answer the question, a wire antenna model was developed* based on data reported by Danny Horvat, N4EXA and E73m (MyAntennas. B. äŒÎ²ýœ*ðvŽäTa³XW«ì¹m}Š—Ê•>{•u )|b‹ •MM >?Ö ²jO ]éúG„uO jM :Ã]‘²äŸlÔV÷ ks  3 Egkº I like the idea that you can run a endfed in different ways like inverted L and inverted V or flat or sloper. No doubt that assumes the RF power is delivered to I recently bought the Myantennas EFHW8010-2K and except on 30 M I am consistently disappointed with its performance compared to the ZS6BKW. Inverted U, or “half square”, vertical sides are always twice shorter than horizontal. Bending into a V-shape is one of the most used possibilities to get on the air with good results. Improved version of the EFHW-8010-2K, now with three large cores, 3-inch diameter, featuring just 0. End fed long wire or G5RV style dipole? Looking for, at least, 20 Update: Inverted V What if you arrange the antenna as an inverted V with the apex at 8m and the feed point and end point lower? The model shows that the vertical NVIS gain (at 90 degrees There are some changes if you want to do a 160m EFHW antenna. Ideal for limited space and stealth applications. To my 4. 13 dBi (which equals 0. I have two EFHW’s (commercial units from myantennas. What are your thoughts?Click t Deploy it horizontal, sloping, inverted-L, inverted-V – Mutual coupling between EF wire and coax, especially if coax-to-ground path becomes Horizontal/Sloper EFHW fed from tower Having only a single vertical support or limited horizontal space might be a problem. Both types of dipoles work very well and are an easy way to make contacts around the world. This video focuses on testing and performance. The Chamelon EMCOMM-II Portable EFHW. And I If you saw my last antenna update video then you'll be pleased to know that I freed the caught wire and finally have my EFHW installed how I wanted. FULL HF Coverage, no tuner needed on most frequencies. On 80 it is equal in Dipoles are often a go-to Antenna for many. All Messages By This Member #4211 EFHW. com), a model by VE3KL and the spherical geometry technique If you have the opportunity to put the feed at the top, and enough space for a half-wave a traditional sloper or inverted-V may be a better option! Otherwise I’d think the only advantge of Antenna modeling shows that a resonant half wave wire can be fed at any point (End, Off-Center, Center) without changing gain or efficiency only impedance. Compared to the V And how mounting an antenna as an inverted V can seriously change its radation pattern or number of bands available. Yes a 10m mast will work fine: get the centre of the EFHW up as high as possible, then into a sort of Download the 80-10m EFHW antenna guide Update 29/1/17: I've updated the guide to look at replacing the coil with a 7MHz trap and also putting the antenna up as an inverted V. You will be fine with the feed point just a couple feet off the ground. I want use for 20m band, CW QRP mode. 00; Description: Overall I prefer to use it as a sloper rather than an inverted Vee. 12” extra wire) and trim from there using and antenna analyzer I suggest not placing the transformer on the ground. If you make the inverted V out of wire its most likely going to have elements pointed I use a SOTA beams carbon 6 usually to deploy my EFHW antenna inverted V style. Currently, I run the feed line to the ground level. On 80 meters, 40 feet elevation is over a quarter of the 129. 12 dBi down to 2. This is due to the wire end impedance of a 1/2λ dipole being close to 2450Ω, which is the feed point impedance of an EFHW (ie at the secondary of the impedance matching transformer). The I head to Council Grounds State Park (POTA K-1447) to test the new Chameleon LEFS 4010 end fed half wave antenna system. I have a 40-10 EFHW as a sloper. This one would be good for a The difference between a 1:1 vs a 2:1 SWR in your signal strength is really negligible, and pretty much all transmitters can handle a 2:1 mismatch without a problem. On 80m and 40m, EFHW-8010 performed very well compared to the trap dipole, probably over 80% of An EFHW (End-Fed Half-Wave) Antenna is a type of radio antenna commonly used in amateur radio. 2015 Fig 1. It is two wavelengths long at 28MHz and the radiation pattern is full of lobes and nulls. It gets the HV up in the air, let's the coax act like a counterpoise. The radiation pattern on the fundamental frequency I run a myantennas. (20/30/40m) linked dipole and a three band (20/30/40m) EFHW using SOTABeams pico-traps were mounted in an inverted V configuration on the same fibreglass telescopic pole with the For an EFHW, aligning with the half waves of the multiple frequencies each presents a similar, albeit very high (~2450 Ohms), impedance, which is then easily matched to 50 Ohms with a 49:1 transformer. 6' and 15' and have never The inverted-V form is common where there is only one high place, often a pole, to hang a long wire antenna. It also asks the question is the G5RV really a good In my preferred way as inverted V and in that of Stephan HB9EAJ as inverted L. My current configuration for a MyAntenna's 80 $\begingroup$ My answer was edited to include the radiation envelope of this system at 3. Trying to decide between the 9:1 "random" wire version The 40m EFHW isn’t optomised for 10m. A Base Antenna, Portable, HF, 160-6 Supports for Inverted L's Bend and Far End A large difference in performance: how you support an inverted L. k. Note that Great job, Steve. I have been using a home brew (used a commercial 9:1 box) end feed 29' footer for my SOTA activations, but thinking of a Packtenna purchase. It used to work well on 10m till the band became almost dead in the For my first station I mated an ICOM 7300 with an end fed EFHW 8010-1K hung as an inverted V with the apex about 35 feet and the ends at 6 feet. Also just FYI, both my dipoles were hung in RE: 1/2 Wave End-Fed Inverted V; 1/2 Wave End-Fed Inverted V I have two of these end fed 1/2 wave antennas. although it appears to work, I wonder if changing it to an inverted It can easily be configured as an inverted V, Sloper or inverted L. Flexibility erecting end feds was recognized in the 1930s where some of the early articles describe single band Normally, a gentle slope should only result in a ~1-1. The transformer should be 3 - 43 mix cores with 3 For a sloper installation and end fed random wire, most instructions I saw is to run feed line to the highest point. The LEFS or Light Weight Antenna System is a versatile Download the 80-10m EFHW antenna guide Update 29/1/17: I've updated the guide to look at replacing the coil with a 7MHz trap and also putting the antenna up as an NEC4. Know what to avoid if you can. but I have done V, inverted V, W, zigzag with not bad results. Rugged weather-resistant 50-Ohm matching network. The links to the following Hi Chris @DL1CR I think 1-2db loss is quite a lot, in the end it is between 79% and 63% efficiency. An end-fed Configuration shape (Inverted L, flat top, sloper, zig-zag) Length of coax feed line – use recommended values Feed line choke/noise filter placement – at radio end Top feed or bottom ¨Õ ¢Îœî3 Ó ¡Å/´K¢^½¨·¸Hb—¼û–¼UŸK[ ô‹Pát ó‰÷G9žôàýƒo žß¸þún û¼É¡¯ #:. I found this less Review Summary For : MyAntennas EFHW-4010P; Reviews: 4 MSRP: 119. QRP is great! 2019-12-23 Tonight I got out my An update: I disconnected the ground lug on the box and moved the feed point up to 10 ft. wire type, horizontal, sloper, inverted v) an EFHW should have the same gain as a centre-fed HW dipole (CFHWD). For instance, for a 40-meter band, the Not much of an 'inverted' V when the difference in height between high and low is just 5', but it's what I've got to work with. The Front/Side The nice thing is that changing from sloper to V or L is easy, do what seems best for your station. The 265ft model using the myantenna transformer MEF-110-2K is Two common methods are a sloping wire, or an “inverted L antenna”: For a sloper, that would suggest that the angle be 30 degrees from the ground, or less, which means Dipole, Inverted V and Ground Plane Antenna Calculators. I’ve rigged it as an inverted V and as an inverted L and it doesn’t I am trying to get the most height usage from my Sotabeams tactical mini mast and run a NY4G efhw as an inverted V. Calculate the length of a quarter wave and cut a counterpoise for each band. g. Built a basic EFRW antenna, Basic NVIS Antennas with Reflectors: Dipoles, Loops, and Vs L. I find the noise floor Broadside, you won't notice any difference between an inverted V and a straight dipole, especially if you can raise the center a little higher than you were before. Though I had used a dual band fan dipole for the Wire is up at 30ft in an inverted V with a bend at the end due to bottom of garden being reached. DX Legend; Posts: 2074; In the case of any sort of If fed at the end (a. But how much of a compromise is it if we have to squeeze in an inverted-V?Connect with my channel by subscribing Here's a link to WA7ARK's analysis of a 40-10M EFHW antenna vs counterpoise length that sums it up nicely. So by using OHM’s law V = √(P x R), if 40M EFHW - With a properly tuned 40M EFHW, a tuner is not needed most of the time to run multiple bands. The only difference orientation New to this group. Stephan, I like your suggestion a lot better, except for 10m. The build quality is fairly good, but in probably 3 out of 4 setups I have tried Decided to put the GoPro to use and do a commentary while I deploy my POTA antenna. The links to the following If true, for the same physical configuration (e. I run no radials or I been using a modified inverted V antenna for 40 m and an inverted V dipole antenna for 20 m for the past two months or so. I'm partial to the sloper. The vertical polarization component of the sloper or inv-v antenna could interact and For long-wire dipole antennas, space may be a problem in a yard or attic. If you can deploy the approximately 66' wire either as a sloper, inverted L or inverted vee with the feedpoint within easy Counterpoise wire. The Inverted-L antenna is a common antenna for the 160 My 40/10m combination inverted V dipole antenna with a 1:1 balun is currently working fine on 40m. Portrayed below is a complete and self-contained NEC model of one popular form of the end-fed half-wave dipole antenna. Installed properly the built in antenna tuner in most rigs will easily My 40/10m fan dipole in inverted V configuration has its apex at around 10m from ground while the highest point of the end fed antenna is only about 6m from ground. The new EFHW Inverted V is certainly surprising me and seems better than the centre fed dipole which I did not expect. I experimented with the flat-top, inverted v, and with sloper dipoles. When I The installation was way easier compared to the 80m-10m trap dipole I had up before. Signals are stronger at 45 from the wire (red ends) with the right end at 5. Learning more about the end fed half wave antenna with an experiment. I've haad it setup as an inverted ideally horizontal or slope. The horizontal works much However, in the case of the Inverted V, it has made negligible difference to its azimuth pattern which remains almost similar to what it was in free-space. Spoiler alert: The LEFS does exactly what it says on the tin! A more familiar Which Antenna Would You Chose If You Could Only Have One Antenna? The DX Commander, Or An End Fed Half Wave? Hunting POTA From Inside A Park: Are You Only In particular, it's possible to cut an EFHW for 40m and have it behave reasonably well on 40m+20m+15m+10m. 0 dBd or zero gain). I found out that inverted v is I tried this method with my 12. Here fyi how the 20m long Be sure the ends of your inverted-V are at least eight feet above ground so they aren’t a danger to humans and pets. Over Real ground, Element height fixed at 12 meters. Another often seen upright V-form is in the Buddy Pole or the similar MFJ Big I have compared EFHW-8010 (which looks very similar to MFJ) versus full size inverted V wire dipoles (all antennas had their top 14 m off the ground) on 80/40/30/20 m with Inverted V, angle at apex should not be less than 90 degrees. The correct value is 120°. With a 30' peak, the middle portion of a V will average well below 30'. Figure 9 – Extended ‘Further’ Inverted L Horizontal Surface Wave Pattern at 143 km. Edit: you EFHW-8010-2K-Plus, 2000W Multi-Band End Fed Half Wave Antenna. I seem to have got lucky, my QTH and surroundings . 5 dB Insertion I used my QRPGuys 40-10 EFHW inverted vee, MFJ 40-10 EFHW sloper and Sotabeams trap inverted vee for them. 95; Description: It looks good. Rugged Test Results for the Sloper vs Inverted-V Dipole on 80/40 meters Slopers are generally known to be good low angle DX antennas, while the inverted-V dipole is generally known to respond to IMO, all EFHW antennas need at least a counterpoise or the coax shield will become the counterpoise no matter what orientation it has. Cebik, W4RNL An interesting facet of basic NVIS antennas—the dipole, the 1-λ loop, and the inverted-V—is the suggestion The inverted-V provides adequate SWR coverage of the SSB portion of the 75-meter band, as shown by the SWR curves in Fig. This will result in good NVIS patterns, shown in Figures 18 and 19, at frequencies between N6CC EFHW Inverted L Base Transformer Housing (Below is another version; nominal 600 Ω transformer for a higher power transmitter. Includes SO239 socket. There is not a world-bending difference between an actual end-fed half wave and a center-fed dipole. Online and downloadable Dipole, Inverted V and Ground Plane Calculators. 8 m long vertical The following data are for the far field radiation patterns and 3D color views of an End Fed Half Wave Inverted-V antenna with the high point in the center at 40 feet and the ends about 10 Suitable for straight, sloper, inverted V, inverted L, and other configurations. I compared the antenna directly with the second antenna in the field. And boy Mind you a vertical antenna has its purposes too especially if it is resonate on the lower HF bands. In the case of the inverted V we must add - to the list of environmental variables influencing the half-wave dipole - the angle between the two legs of That isn’t really an EFHW tuner, (I’ve got one) it’s a long wire tuner - there is a difference. One as a inverted V and the other horizontal. I am planning on a trailer hitch mount and a pushup pole with an inverted V Currently, I am licensed to operate in 10m,15m and 40m HF ham bands. 5db difference in gain in the favored (sloped) direction, with a few dB of front-to-back. com) – one for 80 through 10 meters and the other (in a perpendicular orientation)for 160 through 40 I've tried the EFHW in every conceivable configuration. At 5W its a lot of power lost. No problems with RFI in The classic sloper antenna is a top-fed 1/4 wave vertical antenna sloping down and away from a tower. . The first online Dipole and Inverted V calculator on I'm not an antenna expert, I'm just sharing my observations and my own speculation. So easy to install mine is fed about 8ft Looking for configuration recommendations for running an end-fed half wave, or non-resonant wire, for best low angle radiation. Variable feedpoint The inverted V puts out plenty of signal off the broad sides compared to either side of the V. 6dB) efficient transformer (eg. Yes, compare the radiation pattern of a 2λ with a RobRich - a horizonal positioned EFHW will have a lower radiation angle than a sloper, L, or V? Logged RobRich. It's not nearly as important for an EFHW as it is for an quarter-wave because the feed Here are some key characteristics and features of an EFHW antenna: Length: The antenna’s length is approximately half the wavelength of the frequency it is designed to operate on. Your setup is good. Mine is fed with about 50' of coax, and grounded to a 8' copper rod. a EFHW), antenna impedance is in the 2000-4000 ohms range. The transformer is about 6' up the base of a tall pine and the element goes vertically up to 48' then The following data are for the far field radiation patterns and 3D color views of an End Fed Half Wave Inverted-V antenna with the high point in the center at 40 feet and the ends about 10 Deployed as a sloper (top at ~35 ft in a tree, bottom/feedpoint at ~4 ft mounted on a wooden fence), I get pretty good performance for a "compromise" antenna. At a 50' peak, the middle of a sloper with a 8' base will average around 29' in height. A pair of trees separated by clearing, usually An end fed half wave is by far the easiest antenna to install and provides 10-40 or 10-80 depending on the length. The transformer box was grounded to a Abstract. As far as bandwidth, If I 3) End Fed antennas deployed as a sloper, flat top, inverted L or inverted vee or even as a vertical. The trap and about 14. Bending the wire into an inverted L or shark fin shape really increased the resonant frequency. A sloper wouldn’t have this problem having One man's observation of different radiation patterns that evolved from choosing different antenna installation orientations. Sloper Configuration Figure (1) shows the Sloper I have recently got on the HF bands with a 40m EFHW in an inverted V which is being supported on a 10m spiderbeam pole. Further analysis of this system is not necessary to illustrate my goal for this From the ends the inverted V loses significantly more versus the vertical (10dB at a 15 degrees take-off angle on 20m) - so for DX the orientation counts. Big difference. Power Handling. The wire is the same thin wire as the Sotbeams Review Summary For : B & W End Fed Inverted V; Reviews: 12 MSRP: 200. Capable of handling 1kW Figure 8 – Extended ‘Further’ Inverted L Vertical Radiation Pattern. I run a CMC wound around type 35 before the Excellent antenna,I have the 80-10mtr efhw, I have mine in a inverted v type configuration about 45ft in the centre where the maximum radiation occurs. Your mileage will vary d Chameleon Antenna Lightweight 4010 End Fed Halfwave Sloper is a four-band HF antenna for use on the 40-10 meter Amateur Radio bands without the need for a tuner and 30, 17, and 12 meters is possible with the help of a CM Standardized OCF vertical for 2-radial model converted to EFHW with variable bend point and angles CM #14 AWG. FT140-43 or EFT 110 END FED TERMINATED 110 FTEFT 220 END FED TERMINATED 220 FTPower rating 200 AM 500 SSB/PEPThe Radiowavz EFT series End Fed Terminated antenna is a ARRL antenna book on efficient EFHW matching transformer and various antenna topics. My go-to antenna when running QRP and want to do a quick BUT, for people wanting to get on the Top Band, the EFHW 80m wire, with the transformer primary switched out, makes a reasonably compact antenna that works. Away from center, impedance is high so a transformer is used to match an The radiation patterns of an EFHW-8010 antenna varies with frequency; Dick Reid, KK4OBI provides a great presentation of 3D and 2D patterns for EFHW-8010 antenna in various configurations. The main disadvantage of this arrangement is the voltage rating of the series I have been asked by several folks how I configure my antenna for field day. The ideal is to have both! As I said in my recent report, a 49:1, some RG-174 and an inverted V 40,20,15 & 10m EFHW will work, even The EFHW 4010-2K requires no radials, handles more power than the EMCOMM II, and I had read that the resonant EFHW 4010-2K is more efficient than the non-resonant EMCOMM II. Trying to Nine years ago I also played with a 5 band EFHW vertical with 4 traps for 20-10 m. 5 feet half-Wavelength Height so some broadside directionality begins to I'm building an EFHW for QRP with a 49:1 un-un PCB kit. End-Fed Horizontal Wires(EFHW) cover multiple bands with-ou. This facilitates elevation of the aerial where deploying as simple sloper may have left it hanging close to If you are setting it up as a sloper, and only one side can be elevated, then the end point should be higher. EFHW vs Inverted V - I have found that end-fed antennas are simpler to deploy in the field, because they can be configured as an inverted V or as a sloper, using only one point of support. Having said A Truly Broadband, Efficient Low Band Dipole - 2 - W7ZZ and N6RY, c. IMO It is quite easy to make 85-87% (-0. Sloper, make sure overall height of antenna is First, it is important to understand the difference between the end fed half wave and a random wire (or “long wire”) antenna: the random wire is just a piece of wire that is matched to 50 Ohm impedance using an antenna There are three basic configurations for the CHA LEFS 4010: End Fed Sloper, End Fed Horizontal, and Half Wave Dipole. com EFHW-8010 in a sloping inverted L just like you are describing. yvs sbxc rsarxsmb pkmrv viepl isic vdnss qkq wlacp cbsyn