Unknown 50W Drake

[bill bokey]

I have this 50W Drake, can anyone help me identify and date it ?

Primary DC resistance :

red-white : 84.1 Ω
red-brown : 41.7 Ω (1.66H)
white-brown : 42.6 Ω (1.65H)

Impedance : between 3k3 / 3k4

orange : common
yellow : 4 Ω
green : 8 Ω
grey : 16 Ω

[Brian Wallace]

Hi Bill,

Looks like a 784-139 OT to me.

[bill bokey]

Hi Brian,

That's what I thought, thanks.
Any idea how I could date it?

[Brian Wallace]

Hard to tell without some kind of date stamp. I would have to say anywhere from the late 60's into the 70's.

[neikeel]

My guess is ealy 70s

Up to 69 they had two hole bell covers, from 70/71 (not exactly sure they had 6 hole covers (like yours but no date stamp)

You see date stamps from 75 or so (unless people have earlier ones?)

[bill bokey]

Good point, Neil !

Here's a 69 JMP50 I had on the bench a few years ago :



Thank you both