[BC] Moseley 6060 STL Transmitter notes.

[Ron Castro]

Thanks for the info, Steve.  The units I have range from very new (less than 
6 months) to older (more than 8 years, but I do have two units from 
November, 2000.  Hopefully, they weren't effected, but I'll keep an eye on 
them.

Ron Castro
Chief Technical Officer
Results Radio, LLC


----- Original Message ----- 
From: "radioranger" <radioranger at comcast.net>
To: "'Broadcast Radio Mailing List'" <broadcast at radiolists.net>
Sent: Tuesday, May 31, 2005 9:03 AM
Subject: RE: [BC] Moseley 6060 STL Transmitter notes.


>I think that they were about 3 or 4 years old... the symptom was that the
> transmitter or receiver would stop operating, then lock up and start 
> working
> again.  Of course the equipment in question was at a remote relay site, so
> no one was there to see it happen.  I put a "telltale" latching relay on 
> the
> receiver squelch contacts and found the problem with the receiver, but
> unbeknownst to me the transmitter was doing the same thing--- Kevin Winn 
> has
> the solution.
>
>
> Steve B.
>
> -----Original Message-----
> From: broadcast-bounces at radiolists.net
> [mailto:broadcast-bounces at radiolists.net] On Behalf Of Ron Castro
> Sent: Tuesday, May 31, 2005 9:47 AM
> To: Broadcast Radio Mailing List
> Subject: Re: [BC] Moseley 6060 STL Transmitter notes.
>
> I've got several of those types of units, although fortunately, no
> failures...yet.  Were these recent units that had the problem?
>
> Ron Castro
> Chief Technical Officer
> Results Radio, LLC
>
>
> ----- Original Message ----- 
> From: "radioranger" <radioranger at comcast.net>
> To: "'Broadcast Radio Mailing List'" <broadcast at radiolists.net>
> Sent: Tuesday, May 31, 2005 6:12 AM
> Subject: RE: [BC] Moseley 6060 STL Transmitter notes.
>
>
>> You may have only "fixed" your problem temporarily.  Talk with Kevin Winn
>> at
>> Moseley about the bad SMD capacitors that have been plaguing the PLL in
>> Moseley PCL 6000 series equipment, both transmitters and receivers.
>>
>> Steve B.
>>
>>
>> -----Original Message-----
>> From: broadcast-bounces at radiolists.net
>> [mailto:broadcast-bounces at radiolists.net] On Behalf Of jon
>> Sent: Saturday, May 28, 2005 10:49 PM
>> To: Broadcast Radio Mailing List
>> Subject: [BC] Moseley 6060 STL Transmitter notes.
>>
>>
>> As always, a piece of equipment decides to take a "holiday", during a
>> holiday weekend. This time it was a Moseley 6060 STL transmitter.
>>
>> The usual thing happened: No AFC lock. And, of course, the old 505 backup
>> would not lock either, when the OM tried it.
>>
>> So, I pile in there, and poke around the PCL 6060. (I spent a few minutes
>> literally slapping the old 505 to get it going again. A few swift wacks,
>> and some adjusting of the AFC pot got us back on the air...kind of. The
>> 505 had somewhat low modulation, but I was focused on fixing the 6060. 
>> So,
>> I cranked up the output of the Orban into the 505, and we had a signal
>> of sorts).
>>
>> All supply voltages check out. Pop the cover, and the unlock light on the
>> FMO module is on. Of course, the (stupid) foam mounts are rotted, so the
>> FMO is just floating around the chassis. Fortunately, nothing was 
>> shorted.
>>
>> With much fooling around, a lot of it trying to find where the previous
>> engineer hid the manual, I got to work. The reference osc had no output.
>>
>> Manual found, and after quite a bit more time debugging the reference
>> oscillator, found out the 3.2 MHz crystal socket had "cold" solder 
>> joints.
>> Fixed that, and all was well.
>>
>> Good thing I am comfortable working with the 145152P2 PLL chip (Don't
>> ask, but it had something to do with the phase locked transmitter I
>> designed and built for a pirate station when 145151s were still brand 
>> new.
>> :-) Statute of limitations are up, so that ok to say. Hehehhe).
>>
>> So, moral of this story is check TP1 on the PLL circuit (which on the
>> board
>> is a different TP1 that is referenced in the tuning/troubleshooting
>> section
>> on the incorrect and annoying manual). If you get nothing, pull the 
>> "oven"
>> off of the xtal and give it a wiggle.
>>
>> It might save the day, or at least some time.
>>
>> Hope this all help someone in the future!
>>
>>
>> Jon
>>
>>
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>
>
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