McMurdo MP4

[Dave]

Hello all, been awhile but know some of you may have reworked schematics from Gerry.
I've acquired what is considered the 3rd iteration of the MP4, ie with the 6B5 dual triode supply. Any leads for this set's schematics is appreciated. Dave

[Kent King]

I looked through my MS folder (not very extensive), I only have schematics for the earlier version using the 42 outputs. Hopefully, someone here might have more. Did you post anything on the Antique Radio Forum?

Kent

[Dave]

No, I have not Kent. I know Dave and others here may have some of Gerry's work, should be a treasure trove but I lost touch with him and not sure his work was printed ?

[Kent King]

I never got all of Gerry's MS materials. We did an exchange of data once back in 2006, I have everything from then, but that's a long time ago. And nothing in there on the MPIV you need.

Sadly, I haven't talked to him in quite some time.

Kent

[David C. Poland]

Dave - I have Gerry's diagram for a version MP4 with 4 push-pull parallel 6B5's. 2nd AF is a pair of 6C5 drivers on the amp. Two field coil speakers: one each bass and treble. Uses octal tubes on the tuner like 6K7's etc.

Diagram date;11/20/35. As usual, no parts values, just reference numbers for each resistor and cap.

But, The parts list on the earlier MP4 using 42's probably identify the later diagram reference part numbers.

I have your phone and cell phone numbers. I can try emailing or text to you. Which number to use tomorrow.?

[Dave]

Hello David, thanks for helping out. Cell works where we can exchange email for better resolution as needed.

[Alex R. Whitaker]

Who is this "Gerry?"  I have the Puett book for the MP V, but nothing substantial for the MP VI.  If he has reworked, modern schematics, I'd definitely be interested.