Model 650 Tone Control Question
Posts: 7,285
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
What you are looking for is a transformer that will match 6K to 1 1/4 ohms. Normally the plate impedance would be higher but these tubes are configured in a triode setup for less distortion vs the more common pentode configuration. Something like a Hammond 125E electrically would come pretty closes but mechanically it kinda big compared to the original.
https://www.hammfg.com/electronics/trans.../125a-125e
GL
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
(This post was last modified: 07-08-2023, 02:56 PM by Radioroslyn.)
Messages In This Thread
RE: Model 650 Tone Control Question - by Radioroslyn - 07-08-2023, 02:45 PM
Users browsing this thread: 4 Guest(s)
|
Recent Posts
|
Philco 60 Squealing
|
All correct shields must be in place, all tubes correct no subs of any kind.
Check any soldered, riveted ground conne...Chas — 01:24 PM |
Philco 60 Squealing
|
I have recapped and replaced out of tolerance resistors and so on. Radio plays nicely on fairly strong stations. The pro...dconant — 10:55 AM |
Philco 46-420 Code 121 Reception issues
|
Welcome Eric,
I agree with Bob and far as the two main electrolytic filter capacitors did you change them yourself or w...radiorich — 11:43 PM |
Philco 46-420 Code 121 Reception issues
|
You mentioned the Philco manual and going through the check points...just to be sure we're on the same page here's the m...klondike98 — 08:13 PM |
Philco 42-1008 conversion kit
|
Interesting. I haven't seen that before.klondike98 — 07:02 PM |
12' Philco
|
Yes I had looked for it on the web as well some time back and could not find it. I was glad to see it turned up in Ron'...klondike98 — 06:59 PM |
Shadow Meter Bulb
|
Now if you had a set with a tuning light then the bulb type is important to the circuit, some sets used those prior to t...Arran — 04:58 PM |
Shadow Meter Bulb
|
Ok. Thanks for the correction.RossH — 03:09 PM |
Model 28L
|
For 28 you will probably need to buy a Hammond 125CSE. Or any of the series of the power you need, with SE suffix. Then ...morzh — 02:09 PM |
37-60 revision 6
|
I am restoring a Philco 37-60 and it shows run 6 they removed the ground from G3 of the 6K7G and put the G3 to -2.5v for...bobbyd1200 — 01:01 PM |
Who's Online
|
There are currently 4038 online users. [Complete List] » 1 Member(s) | 4037 Guest(s)
|
|
|
|