[Boatanchors] HP 606 vs. 608

[Richard W. Solomon]

I wouldn't trust a frequency counter with a free-running reference oscillator
unless you have a way to calibrate it. If you use a GPSDO and the 10 MHz output
as your counter reference you are in pretty good shape.

73, Dick, W1KSZ

-----Original Message-----
>From: "James A. (Andy) Moorer" <jamminpower at earthlink.net>
>Sent: Feb 11, 2009 7:52 PM
>To: boatanchors at qth.net
>Subject: Re: [Boatanchors] HP 606 vs. 608
>
>Indeed, using a generator with dinky little output transistors to feed an 
>unknown piece of equipment is asking for trouble. Feeding something with a 
>606 or 608 which have vacuum-tube followers on 150-volt power supplies will 
>take just about anything you can give it - and may fry whatever you try to 
>connect it to.
>
>Indeed, the 606 makes a great VFO, although the output may be a bit hot for 
>your use, and, as noted before, you will want to use it with the 8708 
>synchronizer to keep it from drifting off the edge of the band. A .01 in the 
>line never hurt anything. Similarly, you may want to put a frequency counter 
>on it to see exactly where you are. The 608 has two outputs - one isolated 
>output before the attenuator that can go right into a frequency counter, and 
>the other after the attenuator that can go to the crystal input.
>
>James A. (Andy) Moorer
>www.jamminpower.com
>
>----- Original Message ----- 
>
>> Be very careful. I was once working on a transmitter and needed VFO input.
>> Hooked up my  Hi Tech HP Signal Generator and found I was pumping voltage
>> from the transmitters Osc stage back into the Signal Generator. Blew out a
>> proprietary output chip on the generator and hence destroyed it. Not 
>> happy!!
>> Lesson for me is that I ALWAYS put a .01 mfd cap in the line of my 
>> generator
>> now.
>>
>> Mark V Johnson VE3DJU/VE3DDI
>> ----- Original Message ----- 
>> From: "Barrie Smith" <barrie at centric.net>
>> To: <boatanchors at qth.net>
>> Sent: Wednesday, February 11, 2009 6:44 PM
>> Subject: Re: [Boatanchors] HP 606 vs. 608
>>
>>
>>>I have a 606A.
>>>
>>> I've been thinking of using a small rice-box as a VFO for my 
>>> HT-4B/BC-610.
>>>
>>> I wonder if the 606A would work well as a VFO for the transmitter?
>>>
>>> I would be feeding the output of the 606A into the crystal socket on the
>>> tuning unit.
>>>
>>> Any thoughts?
>>>
>>> 73, Barrie, W7ALW
>>>
>
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