I "kinda" remember 20,000ohms/volt as being the "standard" for those days. But
at my age, my kinda and facts might be off...
Les
----- Original Message -----
From: Barry <[email protected]>
To: R-390 Mailing List <[email protected]>
Sent: 9/2/2024 9:31:15 AM
Subject: [R-390] Measuring Resistance Values
________________________________________________________________________________
Did Collins specify what input impedance a meter should be to properly read the
resistance values in the manuals? I did see where a TS-352 was mentioned but
that's selectable between 20,000 ohms/volt and 1,000 ohms/volt.
I started checking the RF Deck in my R-390 and, starting with V201, I noted a
few values that are significantly high. I was using a modern DMM with 10M
input impedance so not sure if that could be the problem but I doubt it would
account for that much difference but who knows.
The voltages were off a bit as well but not nearly as much as the resistance
values. I suspect the radio will still work with wacky voltages but the R
values really have me thinking I have work to do.
Thanks,
Barry - N4BUQ
______________________________________________________________
R-390 mailing list
Home: http://mailman.qth.net/mailman/listinfo/r-390
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
R-390 mailing list
Home: http://mailman.qth.net/mailman/listinfo/r-390
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
