Chuck, My plan is to bring audio out to an unused RCA jack that can be restored later if necessary. I have a modified Marantz 1030 integrated amp. It's modified so that the "balance" control is now a fader control. The MONO button bridges the two channels together. Why would I do this? Part of the same plan is to slave another R-4C using the VFO from the first R-4C. This will alow for true diversity reception and also offer an other DX split option. Clifton labs buffer amps will isolate the VFO lines.
I'll tap the high side of the existing R-4C AF controls with a 1 uF cap to the Marantz 1030 where its input Z is about 2K ohm. In addition to being a Hi-Fi amp, the Marantz will form the control center for the two R-4Cs. For your purpose, I would also tap the high side of the R-4C AF control with a 1 uF cap on its way out the back to the Hi-Fi amp of your choice. If you still want to use the R-4C AF control, simply tap the coupling cap to the AF control's wiper arm. Just ensure that the amp has a moderately high input Z. Most consumer equipment uses a Z of about 2k ohm. The lower the input Z of the amp, the larger the coupling cap value required. Paul, W9AC ----- Original Message ----- From: Chuck Pool To: [email protected] Sent: Wednesday, December 01, 2010 11:55 AM Subject: [Drakelist] (no subject) Hi to all Drake fans: Do you think the Drake R-4C could be modified to accommodate one of these two class A audio amps and the graphic equalizer? At present I don't have the schematics for these products. Here are the three links to look at: http://cgi.ebay.com/Valve-Class-Tube-Headphone-Amplifier-pre-Bravo-V2-/260697180184?pt=LH_DefaultDomain_0&hash=item3cb2c34818#ht_5958wt_1140 http://cgi.ebay.com/Bravo-V1-Kopfhorerverstarker-Tube-Class-Rohr-GE1-/260701027235?pt=LH_DefaultDomain_77&hash=item3cb2fdfba3#ht_6316wt_1140 http://cgi.ebay.com/Bravo-Tube-Headphone-Amplifier-V3-EQ-Equalizer-valve-US-/260677485333?pt=LH_DefaultDomain_0&hash=item3cb196c315#ht_3975wt_1176 73, Chuck - AA5WG Cedar, Michigan U.S.A. ------------------------------------------------------------------------------ _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
_______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
