Search results

Ohh.. well.. new is so cheap there. Europe prices are much higher 500-650€.

RM703 is 16 fet amp. I think there is some fet burnt. You can test fets with multimeter. If you chance all fets dont use IRF520 IRLZ14 is the right fet.

Old topic but must reply. I Have owned several different antenna analyzers. First was MFJ 259 and 269. Then Comet Caa-500 and i liked a lot. Comet was better then MFJ. But then i started to build 4G yagis and need high freq. I bought AAI N1201SA 34-2700MHz and AAI N2021BA 1-200MHz vector antenna...

Hi. I have one 124cm long Abbree. It should be VHF and UHF but not work well with PMR446. So i tested it with vector antenna analyzer and result was a surprice. Best swr can be found 140, 200, 300, 420 and 460MHz. Maybe have to cut a bit. I hope this information hepls someone.

My opinion about install height is 11m band vertical quad it have to be about 30m hi on the ground. Then beam cant see near trees or buildings etc. If you havent tested you cant know. I have build and tested quads over 25 years.

I sold my old 4el quad (6.5m boom) to my friend and he installed it to 45m hi tower. I used it to 35m tower. 45m is much better for long qso.

I searched from google and I found 2N7002A . https://alltransistors.com/mosfet/transistor.php?transistor=7201 https://fi.farnell.com/en-FI/diodes-inc/2n7002a-7/mosfet-n-ch-60v-0-18a-sot-23/dp/3127180

I have build quads to 11m band and few notes. First 2el. 1.3m boom and 2mm copper wire works great. Impedance match 1/4 wave 75ohm coax. BW ab. 1 MHz swr 1:1.5. 3el not work because mast tube is too close to feed point. It just kill the antenna. 4el works fine 6.5m boom, 50ohm feed with...

Here is few pictures.

Thank you Jeff. Yes the board is PCMA031A . I Think same board can be found from COMO IC-800. I Found PCMA032 chema and i hope it is near same design.

I bought broken one, no tx or rx. If someone have schema.. please upload it?.

Hi. Original RM3 fet is IRLZ24 or IRLZ14 can be used. IRF510 will work better then 520 but bias is different vs. IRLZ24 RM4 is still unknown?. Driver with 1 fet is bad idea and makes horrible rf. I have removed it my own KL503. Also original biasing is crap. 8pcs IRLZ24 @27v 12w drive 250w out...

Hi. I think it is date or manufacturing code.