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Manual for HP 466A amplifier

 

If anyone has a copy of the manual for this old amplifier I'd appreciate a copy.? Even just the schematic diagram would be appreciated.? I have had this amplifier for years and use it once in a while.? ?There's a DC offset on the output now but appears to have low distortion.? ? Ran on mercury batteries. Now the battery contacts are all corroded so I just connect a power supply to the test sockets.? ?Has germanium transistors and I think it is '60's vintage.? 10 Hz to 1 MHz is its frequency range and has 20 dB and 40 dB selectable gains.
I did check the files.??
Thanks!
Pete??
 

I have a paper copy of the HP-466A manual, serial prefix 226, and could copy the schematic for you.?

Jeremy?
N6WFO?



On Fri, Feb 28, 2025 at 8:12?PM WB2UAQ via <pschuch=[email protected]> wrote:
If anyone has a copy of the manual for this old amplifier I'd appreciate a copy.? Even just the schematic diagram would be appreciated.? I have had this amplifier for years and use it once in a while.? ?There's a DC offset on the output now but appears to have low distortion.? ? Ran on mercury batteries. Now the battery contacts are all corroded so I just connect a power supply to the test sockets.? ?Has germanium transistors and I think it is '60's vintage.? 10 Hz to 1 MHz is its frequency range and has 20 dB and 40 dB selectable gains.
I did check the files.??
Thanks!
Pete??
 

Artek manuals also have a pdf available for the 466A 00466-90002 ;?
?
David
 

Thanks Jeremy!? ?A scanned copy of the schematic diagram would be much appreciated.? ?
My email is wb2uaq@.... ? ?
Maybe I can scan in something for you from my collection of manuals if you are looking for something that isn't readily available.? ? I don't have a listing of what I have.? ? ?My largest set of manuals covers the HP141T and the spectrum analyzer plugins.? ?Might be pretty complete as it came out of HP's repair center in Rockaway, NJ that was shut down when the service centers were consolidated out to CA.
Best regards,
Pete? ?
 

Thanks David!? ? I replied to Jeremy.? ? ?
 

Scan sent to wb2uaq.?

Incidentally, there should not be DC on the output—100 uf capacitor C18, in series with 39 Ohm resistor R35, connects the emitter of emitter follower Q7 to the output BNC socket. C18 should block the DC seen at Q7 emitter (-9.6VDC); perhaps C18 is shorted.

I've found my 466A to operate just fine on a pair of 9V transistor batteries. I wire battery tabs to the original mercury battery terminals and hold the 9V batteries in place with double-sticky foam tape. The 466A is thus totally isolated from anything other than the source and the load.

Paper original will be sent to Dave McGuire on Monday.


On Sat, Mar 1, 2025 at 2:42?PM WB2UAQ via <pschuch=[email protected]> wrote:
Thanks David!? ? I replied to Jeremy.? ? ?
 

On 3/1/25 08:45, Jeremy Nichols via groups.io wrote:
I have a paper copy of the HP-466A manual, serial prefix 226, and could copy the schematic for you.
I've got one of those amps and would like the schematic also.

--
John Griessen
 

On 3/1/25 23:06, Jeremy Nichols via groups.io wrote:
Paper original will be sent to Dave McGuire on Monday.
I don't mind getting it scanned at the museum, but does it still make sense to do that after the revelation that Artek has it available? I hadn't checked before; I had assumed the OP had already done so.

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
 

Dave,
?
The Artek manual for the HP 466A is for serial number prefix 226.
?
Ron
 

David,
?
The Artek manual for 466a is actually 00466-90003.? There's a typo on the website, I'll let Linda know.
It's for serial prefix 226 with backdating for 210, 044, and 019 prefixes.
?
Ron
?
 

Good point. I’d rather patronize Artek and save us both time and money.?

Jeremy?
N6WFO



On Sun, Mar 2, 2025 at 8:37?AM Dave McGuire via <mcguire=[email protected]> wrote:
On 3/1/25 23:06, Jeremy Nichols via wrote:
> Paper original will be sent to Dave McGuire on Monday.

? ?I don't mind getting it scanned at the museum, but does it still make
sense to do that after the revelation that Artek has it available?? I
hadn't checked before; I had assumed the OP had already done so.

? ? ? ? ? ? ? ?-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA
 

John, if you’ll share your email address?with me, I’ll send the schematic.?

Jeremy?
N6WFO?



On Sun, Mar 2, 2025 at 8:25?AM John Griessen via <john=[email protected]> wrote:
On 3/1/25 08:45, Jeremy Nichols via wrote:
> I have a paper copy of the HP-466A manual, serial prefix 226, and could copy the schematic for you.

I've got one of those amps and would like the schematic also.

--
John Griessen
 

I have a scanned copy.? It's not great, and I don't remember where I got it, but I've attached it anyway...
~~
Mark

466A Amplifier.pdf
466A Amplifier.pdf

 

Thanks to all for the information on the HP-466A!
Hope I can help others from my HP experience ('77-'2001).? ?

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