I've searched high and low but not found my Celwave catalogs. The RFS site was
no help. Can someone confirm that the CD220-B is for 220 MHz? Their naming
conventions appear straight forward. And if indeed for 220, has anyone used one
in the ham band on a repeater?
Thanks
Mike/W5JR
For what it's worth, the FCC authorized repeater sub-bands for 2m are
144.5-145.5 and 146.0-148.0, so putting a repeater input (or output) square
on 145.5 will likely have part of the repeater operating outside the sub-band
if that matters to you.
Mike/W5JR
---[Original Message]---
From:
Greetings. While working on an RC-85, the cw (and courtesy tones) suddenly
quit. Repeat audio and speech still work. Input lines to the DAC chip appear to
wiggle in a fashion that suggests they are working - the correct cw is
recognizable on the O'scope but nothing appears at the DAC output.
Some areas have AM stations on 1000 KHz making the 1 MHz split a non-starter.
The 0.5 MHz split solves that and was popular when mobile transmitters had a
tough time with repeat/direct (remember those radios?). The 1.7 MHz split also
solves this and usually is not a problem for newer radios
Another way to validate the 1600 KHz theory is to tune the RX/TX split off of
1.6 MHz. You should easily be able to warp the RX at least +/- 10 KHz and the
TX an opposite 10 KHz for a 1.58 or 1.62 MHz spacing. If the feedback goes
away, 1600 KHz transmitters are the likely culprit. Best of luck
Hello RBites
I think I posted this previously, but still lloking for a 222 MHz bandpass
cavity/filter. It is going in front of a pre-amp, so it does not have to handle
any TX power.
Direct replies appreciated.
Thanks
Mike / W5JR / Milton, GA
[EMAIL PROTECTED]
Greetings. I'm looking for preferrably a 2 port VHF (for 144.8x) antenna
splitter (aka multicoupler). A 4 port would work if that is all we can find.
Please email direct if you have such an item.
Thanks
Mike/W5JR
Local club is in need of a 222 bandpass filter or cavity suitable for use
between the duplexer and the pre-amp. Please email direct if you have one
avaulable.
Thanks
Mike/W5JR
Ron, I think you missed the humor of the response.
Mike/W5JR
---[Original Message]---
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Jul 16, 2008 1:25:57 PM
Subject: Re: [Repeater-Builder] Re: MSR2000 narrow banding
The MSR2000 does not have a syntheser...it is crystal
Another place to look for rx audio is the top side of the volume pot. Some are
squelch gated and some aren't, but it should be constant level and decent
frequency response.
Also, be aware that if you are using tone decode on the rx, the busy light may
not follow the tone decode function. Some
A Ringo (not the Ranger) is an end-fed half wave -- the same antenna as a
Jpole. If you want a rugged inexpensive decent antenna, build a copper pipe
Jpole. Many plans are on the net. I've built several from the Copper Cactus web
site.
Works great, lasts a long time.
Mike/W5JR
---[Original
The 10 dB of pass loss is indicative of the RX and TX ports are swapped.
Depending on what the duplexer was intended to connect to, ignore the RX/TX
labeling and think of the ports as HIGH and LOW. Look at the rx/tx frequencies
on the main label to let you know which is high and low.
Best of
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