Fron an email exchange with Bob Pease, in his own words.
From: "Robert A. Pease"
To: "Bo Lojek"
Subject: Re: Philbrick
Bo Lojek wrote: Inquiring about the Philbrick 6104: And RAP is hereby replying:
OK, I found the Philbrick 6104 Data Sheet, and I should be able to scan it and send it out in a day or so.
To make a 6104: take a K2-P and delete the normal 22M and 1 UF filter at the output. Just connect the output chopper pin to the output pin of the 6104 through a shielded wire. You can add your own 22 M and 1 UF, externally, if you want. Refer to the scanned datasheet.
OR you could put a neon lamp there as an alarm/ flag. About 50 mV (ac or DC) on the summing point will light the neon. (This application is NOT mentioned on the 6104 data sheet.) However, a K2-W swinging at a mere + or - 0.15 volts/usec will have +/- 50 mV ac at its summing point, so this is not necessarily a serious error condition.
In all my years at Philbrick, I never heard anybody ask for that function, or ask ABOUT it. So it must have been fairly RARE and OBSCURE. But if anybody wanted to buy 100, I am sure we would have humored him....
Hey, Dan, did you ever get involved with people wishing for a 6104 version of the K2-P? / Best regards. / rap
P.S. I did find an old 1961-era K2-P Datasheet that said the power requirements on 6.3 Vac were 0.45 mA. No, not really. The chopper
drew 0.45A. Ha. / rap