[Hammarlund] sp600 frequency question

[Eugene Hertz]

well that sounds encouraging.  I do have an old precision apparatus model 48 VTVM but I have no idea if it works right. I guess I can compare it to my DMM for some R's and V's and A's.  The probe on it says "AC-DC VTVM PROBE" but does not give any other info. Do I need an "RF Probe" for the vtvm? Or will this one do?

I understand that the caps I have may just "go" one day and probably take out some resistors and who knows what else, but I might have to wait till then.  These days it can take me weeks to solder a single connector to a wire with the interruptions from the kids! 

Eugene

>-----Original Message-----
>From: Grant Youngman [mailto:nq5t at comcast.net]
>Sent: Saturday, March 19, 2005 07:48 PM
>To: hammarlund at mailman.qth.net
>Subject: RE: [Hammarlund] sp600 frequency question
>
> 
>> I plan for this? I have some black beauties but if I can 
>> avoid it, I would rather not touch them for fear of causing 
>> more damage. 
> 
>Replace them. They will eventually cause you problems, even if things seem 
>to be working ok for now. 
> 
>All you need for alignment is a VTVM (or other HI-Z analog meter) and a 
>signal generator. If you don't have an analog meter, a scope will work. 
>(Digital voltmeters are mostly useless for alignment purposes). A frequency 
>counter is good to set the generator frequency if it is an analog type, but 
>frankly, the SP-600 is not exactly a "frequency meter", so even that is 
>really not necessary if you have a high quality generator known to be in 
>reasonably good calibration. 
> 
>Grant/NQ5T 
> 
> 
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