[Test-Equipment] 8427A crystal detector

[Dave Brown]

Suspect you mean the 8472A?
Its got an OSM input connector (i.e. SMA) , but is 10MHz to 18 GHz.
On the other hand the 8471A has a BNC input connector and is 100 kHz 
to 1.2 GHz.
So the 8472A is probably not what you really need.
 Rtaed max input  is 100mV for the 8472A. Again, probably not what you 
want if tube gear is involved as higher levels  are more likely.
 The 8472A will probably work below 10 MHz but the detector output 
bypassing will be largely  ineffective so you will have fed thru RF 
garbage on the trace. The 8471A will have more filtering (bypassing) 
on the output to be effective down to 100 kHz.

Cheers
DaveB, NZ




----- Original Message ----- 
From: "Eugene Hertz" <ehertz at tcaf.org>
To: <test-equipment at mailman.qth.net>
Sent: Monday, September 26, 2005 12:39 PM
Subject: [Test-Equipment] 8427A crystal detector


> Hello all, fast question.
>
> There is an hp 8427A crystal detector available to me. Specs say 
> 10Mhz and up. I need a general purpose detector for HF/VHF/UHF 
> measurements (up to 1Ghz).
>
> Can anyone tell me if this will work well under 10mhz or should I 
> look elsewhere for another model? Also, I am interested in sweeping 
> tube gear as well, dont know if that makes a difference
>
> thanks
> Eugene
>
>
>
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