The base station referred to here was identified by Motorola as being an
Upright Base Station, the LB xmtr had a 330 W. RF PA, and the HB xmtr was 375
W. RF PA. The only part of the Upright Station which even only closely
resembled the Motrac mobile was the rcvr casting.
And just because it was manufactured during the same era , the 1960's & 70's,
it doesn't even begin to be a "Motrac series radio".
The only HB base station made by Motorola which used a Motrac xmtr and rcvr
was the 110 W. Compa Station.
Allan Crites WA9ZZU
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
Thanks for the info. That's a MOTRAC series radio.
-----Original Message-----
From: kf0m
Sent: Feb 25, 2008 7:26 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Motorola TLD6612A amp repair
 Sorry I don't know a motrac from a micor.
On the other hand I have worked on Mastr pro, execII and mastrII enough to
tell the difference between them.
'The exciter is a TLD1372A with a date stamp of May 1974. It runs an 8552
tube and puts out about 10 watts. Based on the model chart in the front of the
manual, I would guess this to be a B93MPB series station. Based on the picture
in the manual, it is not in the original rack. It does have a control module
panel but does not have a receiver.
When it is in service, the audio and COR come from our MastrII repeater.
John Lock
kf0m at arrl.net
-----Original Message-----
From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of
[EMAIL PROTECTED]
Sent: Monday, February 25, 2008 5:17 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Motorola TLD6612A amp repair
What series station is thisTLD6612A amp used in? MICOR? MOTRAC?
-----Original Message-----
From: Thomas Oliver
Sent: Feb 25, 2008 3:01 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Motorola TLD6612A amp repair
If you need another whole amp or transmitter let me know, not
interested in
taking a working one apart to rob the insulator.
tom
> [Original Message]
> From: skipp025 <[EMAIL PROTECTED]>
> To: <Repeater-Builder@yahoogroups.com>
> Date: 2/25/2008 12:08:05 PM
> Subject: [Repeater-Builder] Re: Motorola TLD6612A amp repair
>
> Hi John,
>
> > "kf0m" <[EMAIL PROTECTED]> wrote:
> > I am working on repair of a TLD6612A 2 meter repeater amp
> > that runs a pair of 8560AS tubes.
>
> Should be quite the smokin' signal when you have the amplifeir
> in line.
>
> > It worked fine for a number of years and then suffered
> > what appeared to be lightning damage.
> >
> > The insulator between the plate line and the plate tuning
> > disc was arced through among other damage. It is a rectangular
> > piece of clear material that looks like mica.
>
> If it is a clearish but dark material it probably is mica. If
> it's the thicker white insulating material it might be beryllium
> oxide, which has danger warnings about breathing any dust from
> the material when drilling or cutting into it.
>
> > I tried adding some Teflon tape to cover up the puncture.
>
> Nope, ain't gonna work.
>
> > When I fired up the amp today, It arced through again during
> > the tune up process. Anyone have suggestions for a replacement
> > or have one in their junk box?
> >
> > John Lock
> > kf0m at arrl.net
>
> Google mica sheet and or look at companies like McMaster Carr. You
> can often find small sheets and parts at woodstove and appliance
> repair places/stores.
>
> www.antiquestoves.com is one place I found some mica sheeting
> available on line.
>
> And of course I searched "mica sheet" on Ebay and hit 10 or so
> supply sources right off the starting line.
>
> cheers,
> s.
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
> --
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2/21/2008 4:09 PM
