Hi Group,
Can anybody out there enlighten me on the power amp failures on the earlier
Kenwood TKR-750 Repeaters? I recall that Kenwood was scrambling around changing
these under warranty when the 750 was first released.
I have just removed one from service that was only pushing 15 Watts @ 7 A
First thing I'd do is pull the Uniboard and squirt
some contact cleaner into the power control pot, then
turn it back and forth a dozen times to clean it. Then
squirt some into all the connectors between the
Uniboard and the pins in the RF tray. Put the Uniboard
back and repeat the cleaning procedu
Gareth,
Email me off the list with the serial number and i will see if we can get it
covered under warranty for you.
Mike
-- Original message --
From: "Gareth Bennett" <[EMAIL PROTECTED]>
Hi Group,
Can anybody out there enlighten me on the power amp failures on th
--- In Repeater-Builder@yahoogroups.com, Bob Dengler <[EMAIL PROTECTED]>
wrote:
> I feel the same way, except that in most cases commercial
equipment is not
> an option for me. I need "VFO mode", which the commercial radios
just
> won't do. Being locked into a couple dozen channels isn't my
Gareth,
Your statement about the receive sensitivity caught my eye. I have to
wonder: Was the front end of your repeater's receiver ever aligned for
optimum sensitivity on your RX channel? Of the several TKR-750 repeaters I
have worked on over the years, only one of them was properly adjusted t
At 04:09 AM 3/18/2007, you wrote:
Hi Group,
Can anybody out there enlighten me on the power amp failures on
the earlier Kenwood TKR-750 Repeaters? I recall that Kenwood was
scrambling around changing these under warranty when the 750 was
first released.
I have just removed one from ser
Have you checked for proper primary power connections. Sounds like a voltage
drop problem. Poor power connections or shorted PA?
Jeff
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Mike Lyon
Sent: Sunday, March 18, 2007 12:15 AM
To: Repea
At 12:14 AM 03/18/07, you wrote:
>Howdy,
>
>Has anyone ever seen an intermittent transmit issue with an MCS2000?
>When I key up, it will key the transmitter for about one second then
>drop and then key up again and drop and then key up again until I let
>go of the PTT. I have tried using two differ
Absolutely correct Eric. The TKR-750 comes factory tuned for wideband base
station operation. The TKR-750 does NOT like anything but a good 50ohm load.
The transmitter will go spurious. I have never had a problem with a version
1 or 2 with a properly matched transmit path. Maybe just luck. I have a
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
> [EMAIL PROTECTED] On Behalf Of George Henry
> Sent: Saturday, March 17, 2007 1:10 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Coax for cabinet and for feedline - other
> than
Jeff,
You bring up an important point. While my previous post was about tuning
the receiver, it is always necessary to avoid either overloading,
overheating, or mismatching the PA in the TKR-x50 or in any other radio.
That's why I put at least a single ferrite isolator at the TX output to
provide
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