[Test-Equipment] HP audio oscillator FS?

Tue Dec 13 14:59:38 EST 2016

     A workable but identical handle for -hp- instruments like the 200CD 
and 410B can be gotten from


http://www.brettunsvillage.com/trunks/howto/parts/schandles.htm

    The ones I've used are the kind with a loop and buckle, they will 
fit the existing staples on the case. To use other handles you must 
remove the staples to get the handles on them. Since clearance inside is 
limited you must use rivets to replace them, screws stick out too far.
      The key for a 200CD and other oscillators using lamps in the 
circuit is to make sure the lamps make good contact with the sockets. 
The quality of the lamps make a difference in the distortion. -hp- 
"aged" the lamps but I found out that they just ran new lamps up to 
barely visible heat and then backed the voltage down slowly, the idea 
being to relieve strains in the filaments. The late 200CD could be 
tweeked to much less than half the distortion spec and still be stable. 
Very early ones would often just make the spec.
     If yours has bent capacitor plates just leave them, that was a part 
of the adjustment at the factory.

On 12/13/2016 8:01 AM, Barry wrote:
> I think mine had some issues that most likely pointed to dirty power as well.  I'd intended to refurbish it to some degree but in a fit of downsizing, I sold it.  I have other audio generators but there's just something about that big old tube gear that attracts me to it.  This one was in pretty nice shape too.  I think that handle might have been a replacement and sure wish I could find some of those as my 410B could use a better handle.
>
> Good luck with your new acquisition.
>
> Barry - N4BUQ
>
> ----- Original Message -----
>> From: "Brian Burns" <brian at lessonsinlutherie.com>
>> To: "Discussion of Electronic Test Equipment" <test-equipment at mailman.qth.net>
>> Sent: Tuesday, December 13, 2016 9:55:44 AM
>> Subject: Re: [Test-Equipment] HP audio oscillator FS?
>>
>> Hello Barry,
>>
>> Yep, that's the one all right. I wish I had kept mine, but it was blowing
>> fuses. It turned out to just need new filter caps in the power supply---they
>> had shorted.
>>
>> Cheers,
>>
>> Brian
>>
>>
>>
>>
>> ---Original Message-----
>> From: Test-Equipment [mailto:test-equipment-bounces at mailman.qth.net] On
>> Behalf Of Barry
>> Sent: Tuesday, December 13, 2016 7:24 AM
>> To: Discussion of Electronic Test Equipment
>> Subject: Re: [Test-Equipment] HP audio oscillator FS?
>>
>> Sold mine a few years back.
>>
>> http://www.knology.net/~thelanding/ForSale/images/hp200cd-2.JPG
>>
>> Kinda wish I hadn't done that now...
>>
>> Thanks,
>> Barry - N4BUQ
>>
>> ----- Original Message -----
>>> From: "Ian Wilson" <ianmwilson73 at gmail.com>
>>> To: "Discussion of Electronic Test Equipment"
>>> <test-equipment at mailman.qth.net>
>>> Sent: Tuesday, December 13, 2016 9:06:01 AM
>>> Subject: Re: [Test-Equipment] HP audio oscillator FS?
>>>
>>> Hi Brian,
>>>
>>> If you are still looking I have one of the 200 models. Yours for
>>> shipping (I was reluctantly thinking of parting it out - gasp).
>>>
>>> 73, ian
>>>
>>> On Tue, Nov 8, 2016 at 5:22 PM, Brian Burns
>>> <brian at lessonsinlutherie.com>
>>> wrote:
>>>
>>>> Hello All,
>>>>
>>>>
>>>>
>>>> Some years ago I was on a forum that was for HP test equipment
>>>> buffs---now that's pretty arcane! Anyway, I ended selling and
>>>> trading various pieces of equipment, and silly me I let my HP 200
>>>> (?) audio oscillator go. Now I need it, or one functionally like it,
>>>> again. I'm leery of buying one on ebay, and thought I would see if
>>>> any of you guys have something for sale.
>>>>
>>>>
>>>>
>>>> Cheers,
>>>>
>>>>
>>>>
>>>> Brian Burns
>>>>
>>>>
>>>>
>>>> Toll free: 866-214-9472
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ---
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL