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FARA
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02-19-2003 07:42 PM ET (US)
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Edited by author 02-20-2003 09:28 AM
Hi,
Welcome to the FARA 2 meter amplifier FAQ pages.
If an individual response is requested please forward
a copy of your message to WA1GPO@ARRL.NET.
73's
Jim
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02-20-2003 07:53 PM ET (US)
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Deleted by topic administrator 03-07-2003 10:25 AM
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| FARA
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02-21-2003 10:34 AM ET (US)
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| Shannon KG4GEH
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02-24-2003 05:05 PM ET (US)
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I have a couple of questions concerning this project, thanks ahead of time for the information!
1. If you have a HT with a single output (6m, 2m, 70cm), to a dual or tri-band antenna. What happens when those signals pass through the amplifier? Will I need a duplexer/triplexer with multiple antennas?
2. Could this project be easily duplicated for UHF or a dual band amplifier?
Shannon, KG4GEH
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| jvaldes
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02-24-2003 05:53 PM ET (US)
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Answers to previous post ...
1. 6&2 meters will pass fine. I expect that it would be OK
on 70 cm - depends on the relay inductance. You might try adding and tuning the relay series cap (C15 -ARCO404)for the lowest SWR on 440 and live with what you get on 2M. It will probably be OK (I haven't tried this ... let me know).
2. The output network is VHF only ... you get to design the dual-band version!
Jim
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| Shannon KG4GEH
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02-24-2003 09:35 PM ET (US)
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Jim, thanks again for all of your help... I will post a link to my (2m) completed project which I am expecting to start really soon!
As for the dual-band, wish me luck ;o)
73's KG4GEH
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| jvaldes
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03-03-2003 11:34 AM ET (US)
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Contact FAR Circuits for amplifier (reference 73-Nov.93)
PC board.
Jim
FAR CIRCUITS
Printed Circuit Boards
18N640 Field Court
Dundee, Illinois 60118
(847) 836-9148 Voice/Fax
email: farcir@ais.net
Note: Do NOT order via email; see order info
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| Shannon KG4GEH
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03-18-2003 02:38 PM ET (US)
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Jim, I have orded all of the parts, should be here in a couple of weeks. Would you mind helping me out with the #18 wire for the coils??? Is this just 18 guage copper wire, or something more specific?
Thanks again, Shannon
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| jvaldes
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03-18-2003 03:11 PM ET (US)
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Nothing special #18 Buss wire. If you can't locate any,
drop me your address at WA1GPO@arrl.net and I'll send
you some.
Jim
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| Shannon KG4GEH
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03-19-2003 10:42 AM ET (US)
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Jim,
Thanks again, I believe I should be able to find some, but if not, thanks for the "fall back" plan!
Take care, Shannon
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| Shannon KG4GEH
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03-24-2003 01:09 PM ET (US)
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Jim, would it work if I used non-tinned 18 guage copper wire??
Thanks, Shannon
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| jvaldes
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03-24-2003 01:35 PM ET (US)
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Yes ... non-tinned will work.
Jim
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| Shannon KG4GEH
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03-24-2003 02:14 PM ET (US)
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Jim, great... I finally have have all of the pieces "in" now... I will post a web site link soon for the progress!
KG4GEH
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| Shannon KG4GEH
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03-24-2003 04:12 PM ET (US)
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Jim, I promise this will be the last question for awhile... but are all of the capacitors used "non-polar"???
Thanks, Shannon
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| jvaldes
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03-24-2003 05:25 PM ET (US)
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I don't remember if C3 is polarized ...
Jim
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| Shannon KG4GEH
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03-26-2003 01:11 PM ET (US)
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Jim,
Concerning the switch... do you have a part #... plus I am having a hard time understanding why both + and - are connected???
Thanks, S
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