>-----Original Message-----
>From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
>buil...@yahoogroups.com] On Behalf Of Jim Kvochick
>Sent: Friday, April 24, 2009 11:42 AM
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Re: Remote Receiver
>
>We've had real good luck with using Icom ICF121S (VHF) and Icom
>ICF221S (UHF) transceivers for this type of application.
>
>For us, the trade off was "folks capable of repairing, maintaining,
>and modifying older gear" vs. "folks who could help us get money for
>newer gear".
>
>We bought a bunch of radios all at once from a local Icom reseller,
>along with 2 programming cables, and one copy of the software.
>
>We didn't buy the required OPC-617 cables that easily allow you
>access to COR PTT AUDIO, etc. but rather went to
>http://presonmoore.com/repeater.html for a good replacement at half
>the cost.
>
>The ICOM radios are quite flexible, and we also liked that they could
>do DCS. Our UHF links are all DCS encoded, which tends to reduce the
>amount of hassle we have with interference.
>
>We deployed 7 remote receivers, using an LDG voter at the transmitter
>site, with 7 Icom UHF receivers there. The remote sites all have one
>Icom VHF receiver, and one Icom UHF transmitter, along with a power
>supply, and an NHRC2 controller.
>
>It may have cost us a bit more money than buying used radios, but we
>just didn't have the resources and talent to troubleshoot and repair
>older rigs.
>
>Jim WB8AZP
>
Jim,
The project, for those who have not caught the beginning of this thread,
is a remote VHF receiver with a UHF link back to a main repeater.
Jim, I like the idea of using the Icom ICF121S (VHF) and ICF221S (UHF)
as you have done. However, I bought the service manual for the VHF
version, and tried to find where I could get non-de-emphasized audio out
of the receiver and where I could insert audio for flat transmission by
the transmitter. (I would be using the UHF transmitter, of course, but I
didn't buy the UHF service manual.) The radio doesn't seem to have any
provision for this, so there would have to be connections made to the PC
board where everything is really, really small. I'm not sure I want to
venture this.
The alternative is to go with de-emphasized audio from the receiver, let
the UHF transmitter apply emphasis, let the UHF receiver do de-emphasis
and feed this to the repeater controller. Is this what you are doing? If
so, you seem to indicate this gives a good result in your case. On the
other hand, if you have found a way to get the flat audio from the
receiver and feed it to the transmitter, can you tell me how you did
this?
I need the benefit of your experience, and I appreciate your advice.
Thanks.
John
