[R-390] HP-606A

[David C. Hallam]

I would second every thing Roy has to say about the 606A&B.  I have a 
606B with the 8708A phase lock unit.  It's a little fussy to get locked 
up but once it is it will just sit there.  I have given up on the dial 
calibration and have my 5245L frequency counter, also a BA, connected to it.

I have never had a problem with 12B4 in the power supply but I know it 
is a problem in my 428B DC ammeter power supply.

Don't plan on moving it very often.  I bought my 606B a few years ago at 
the Orlando HamCation.  I had to drive my car into the tailgate area to 
haul the thing out.  It was in "perfect operating condition" until I got 
it home.  It had a sticky meter but I did get the particles cleaned out. 
  Due to it's weight, getting the cabinet aligned with the panel to put 
it back together was a b***h.

Roy, if you have some good notes about maintenance, please send them to me.

David
KC2JD/4

Roy Morgan wrote:
> On Feb 23, 2009, at 4:31 PM, Barry wrote:
> 
>> Well, as much as I'm trying to keep from collecting radio-related  
>> "stuff", I
>> "won" an HP-606A today.  Any advice on this one?
> 
> Yes: here are some random suggestions:
> 
> 0) Find a good place for it on your bench and leave it there.
> 
> 1) Put the 12B4's used in the power supply on your want list.
> 
> 2) Do a good mechanical overhaul/lubrication.  The mechanicals of that  
> thing are one of it's strong points.  You won't realize what a gem  
> this thing can be till the tuning and output attenuator are working  
> like new.
> 
> 3) Do start looking for an 8708A. This gadget allows precision and  
> stable setting of the frequency However, you need the B version of the  
> oscillator to use it.  So start looking for a nice B. If you have an A  
> and a B, then you can build a signal combiner and do intermodulation  
> tests on receivers.
> 
> 4) Replace the filter caps and run the generator often.  It likes to  
> be used.
> 
> 5) One of my collected emails on the thing talks about poor long term  
> frequency calibration stability.. Possibly from the ceramic forms used  
> in the oscillator tank circuit.  So .. leave the thing on all the time.
> 
> 6) Stand by for a copy of my notes file - sent separately.  A few  
> interesting observations and discussion of the attenuator.
> 
> Roy
> 
> 
> Roy Morgan
> k1lky at earthlink.net
> 529 Cobb St.
> Groton NY, 13073
> 
> 
> 
> 
> 
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