Re: HP-1421A Q109 Voltages
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That's what I kept thinking - especially since everything else that's connected to the base is negative.? Could that be a typo?
Barry - N4BUQ
-8.8V seems much more plausible, with the emitter -9.4V Hugh Gilbert
On Fri, Mar 29, 2024 at 4:02?PM n4buq < n4buq@...> wrote: Chuck,
Thank you so much for that.? I couldn't tell if that was a + or a - in front of the base voltage but that shows it clearly as +.
Thanks again,
Barry - N4BUQ
----- Original Message -----
> From: "ChuckA" <chuck@...>
> To: "HP-Agilent-Keysight-equipment" <[email protected]>
> Sent: Friday, March 29, 2024 2:38:15 PM
> Subject: Re: [HP-Agilent-Keysight-equipment] HP-1421A Q109 Voltages
> Here's a clean scan of the section you are looking at.
>
> ChuckA
>
> On 3/29/2024 3:16 PM, n4buq wrote:
>> Does anyone have a readable schematic for the A101 board in a 1421A?? I have a
>> paper manual on order but until that arrives, I would appreciate finding out
>> the voltages shown for Q109 (Page 5-16, Figure 5-9).? From what I can tell, the
>> online scan appears to show:
>>
>> C: +48V
>> B: -8.8V
>> E: -9.4V
>>
>> The value for B is particularly blurry but would like to know for sure what all
>> of those are.
>>
>> Thanks,
>> Barry - N4BUQ
>>
>>
>>
>>
>>
>>
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