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Wanted: Boonton 91-B Schematic

Started by amdx March 23, 2014
Hi guys,
I'm looking for the schematic of a Boonton 91-B RF Voltmeter.
I can find many other 91 series schematics but not the 91-B.
It would make my job easier with the correct schematic.
  Any leads?
                  Thanks, Mikek

P.S. To Jeff, This is a tube model, I heeded your advice, I'm using an 
isolation transformer.

problem; I have one calibration pot (1V range) that has very little 
effect. The others have about a 30% range, this one maybe 1%.
"amdx"
> > P.S. To Jeff, This is a tube model, I heeded your advice, I'm using an > isolation transformer.
** ROTFL !! Wot simple faith in an idiot's advice. No iso tranny is gonna save a fool like you from death by electrocution. .... Phil
On 3/23/2014 9:17 AM, amdx wrote:
> Hi guys, > I'm looking for the schematic of a Boonton 91-B RF Voltmeter. > I can find many other 91 series schematics but not the 91-B. > It would make my job easier with the correct schematic. > Any leads? > Thanks, Mikek > > P.S. To Jeff, This is a tube model, I heeded your advice, I'm using an > isolation transformer. > > problem; I have one calibration pot (1V range) that has very little > effect. The others have about a 30% range, this one maybe 1%.
Hi, Mike - Would a 91CA schematic help? If so, then... http://bama.edebris.com/manuals/boonton/91ca/
On 3/24/2014 8:16 AM, John S wrote:
> On 3/23/2014 9:17 AM, amdx wrote: >> Hi guys, >> I'm looking for the schematic of a Boonton 91-B RF Voltmeter. >> I can find many other 91 series schematics but not the 91-B. >> It would make my job easier with the correct schematic. >> Any leads? >> Thanks, Mikek >> >> P.S. To Jeff, This is a tube model, I heeded your advice, I'm using an >> isolation transformer. >> >> problem; I have one calibration pot (1V range) that has very little >> effect. The others have about a 30% range, this one maybe 1%. > > Hi, Mike - > > Would a 91CA schematic help? If so, then... > > http://bama.edebris.com/manuals/boonton/91ca/
Ya, I've checked that one, there seems to be to much difference for me to trace it out. Thanks, Mikek