Thanks, Garey. I suspected as much, but wanted to be sure the movements weren't the same.
That R-4B I'm working on didn't fry the meter, but there's still something out of sorts with the bridge circuit, as I can't get the meter to zero when the AGC bus is adjusted to -1.35V. Looks like I'll be checking all the other resistors that didn't look like they smoked... Steve, W1ES/4 -----Original Message----- >From: Garey Barrell <[email protected]> >Sent: Jan 4, 2012 9:20 AM >To: Steve Wedge <[email protected]> >Cc: "[email protected]" <[email protected]> >Subject: Re: [Drakelist] Meter interchangeability > >Nope > >The TR-7 is ALL new. The R-4/T-4 meters are all the same basic movement. The >S-Meter is the same >from the 2-A through the R-4B. The PLATE meter is the same movement, but the >early scale was 0-400 >mA and the later ones, (early to mid T4-XB,) changed to 0-500 mA. The TC-2 >meter is 0-400 mA and >the TC-6 is 0-600 mA. > >They all 'can' be opened and scales changed, but with a fairly high failure >rate in the process. > >73, Garey - K4OAH >Glen Allen, VA > >Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line >and TR-4/C Service Supplement CDs ><www.k4oah.com> > > >Steve Wedge wrote: >> Folks - >> >> I see lots of TR-7 parts floating around the auction sites - including the >> S-meter. Are the "guts" of the TR-7 meter compatible with the 4-Twins? >> >> I'm just thinking ahead, in case I every have another close call where the >> meter doesn't survive! >> >> 73, >> >> Steve, W1ES/4 >> >> _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
