[Hallicrafters] URM-25D arrived

[rbethman]

I don't know that LEDs are so much a forbidden thing.  We all have our 
own ideas and methods.

However, the biggest reason that these lamps are commonly found to be 
dead, is the difficulty in replacing them.

The URM-25(X) *can* be very difficult to work on.  There isn't much 
space that is unused.

I'd go for the Kiss-Electronics "Total Overhaul Kit".  I's also order 
some replacement bulbs.

The reason for the kit, is simply that there are a BUNCH of old 
capacitors inside.  While it may well be fully functional, those old 
capacitors will bite your rump!  It is only a matter of time.  The kit 
also contains the requisite resistors.

Once gone through, and the lamps replaced, you'll be very happy for a 
long period of time.  The current status of yours is testament to its 
longevity.

I am NOT affiliated with Kiss-Electronics in any manner.  I know them by 
reputation.

Bob - N0DGN

On 11/23/2011 10:38 AM, Ross Stenberg wrote:
> LED's are forbidden on that boatanchor!
>
> On 11/23/2011 8:09 AM, Jason Hissong wrote:
>> Hey guys,
>>
>> The URM-25D arrived yesterday.  I powered it up (no smoke) and played
>> around with it.  I hooked it up to the scope and it is generating RF.  I
>> also tested the modulation part and both 400hz and 1000hz appear to be
>> working (that is, the waveform is showing it on my scope).  I then
>> hooked it up to the 1000S and it is pretty accurate, that is, when I had
>> it set to 7000MC on the URM, and 7000MC on the 1000S, the frequency
>> error was in the center on the 1000S.
>>
>> So far it appears that key parts of the unit are working.  Not bad for
>> 116 bucks!
>>
>> The lights for the upper and lower frequency dial is not working but I
>> will probably replace those with LEDs anyway.
>>
>> 73,
>> Jason N8XE
>>
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