[R-1051] URC-104 TXCO needed

[Ray Fantini]

May have to break out the torch and try opening up the can but they did not make it easy. Afraid that I may do more damage than good trying to un solder it. Maybe try cutting it open but that don't look to appealing. Makes opening up and working on the 5.0 MHZ thing in the 1051 like a walk in the park.



-----Original Message-----
From: R-1051 [mailto:r-1051-bounces at mailman.qth.net] On Behalf Of paul swed
Sent: Friday, October 24, 2014 3:34 PM
To: R-1051 Discussion Group
Subject: Re: [R-1051] URC-104 TXCO needed

There are a lot of choices today to replace that TCXO and you could go a bit crazy with PLLs and such. But is it a soldered can? If so those can often be opened and perhaps you can find out what died. I have opened cans like that and been able to fix things.
Just a thought.
Paul
WB8TSL

On Fri, Oct 24, 2014 at 3:27 PM, Ray Fantini <RAFANTINI at salisbury.edu>
wrote:

> It's a long shot but will try anyway. I have two dead URC-104 
> transceivers in the shop at the same time. Both have the exact same 
> problem. The 200 MHz TXCO that's used in the transverter has died. 
> It's a sealed metal can about half the size of a pack of cigarettes 
> that when supplied +12 volts generated a 200 MHz signal that was used 
> in the transverter to heterodyne incoming signals from 30 to 70 MHz to 
> 230 to 270 MHz that's in the URC radios normal receive range along 
> with heterodyning them back at a low level in transmit for 
> transmitting on the low VHF band. Have a bad feeling that I am going 
> to have to get a couple of the little TXCO assemblies that were built 
> for computers and modify them for use in this circuit but in this type 
> of use stability and the ability to be right at 200.000 is fairly 
> important. Have not seen similar failure in the URC-110 or 101 just the 104, go figure.
>
> Ray F
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