Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Echophone S-4 Help Wanted
#8

Further testing of the 245 plate voltage is more confusing (I keep checking the 245 because they're expensive and I'm afraid of killing it.)  At 60VAC, the plate voltage quickly rises to about 110, then over a few minutes it decreases.  After 20 minutes it's down to 70v.
 
BUT, when I ran it at 115VAC, the plate voltage started at 220v and over time, it increased until I stopped at 400v.
 
After reviewing all the wiring again, including the speaker and speaker plug connections, the only thing I'm unsure of is my wiring for the antenna coils, RF coils, and the potentiometer.  First question is, what kind of  RF coils do I have.  I've assumed that they're the original flavor--not the later models with Litz wire.
 
[Image: https://farm5.staticflickr.com/4880/3288...d84f_c.jpg]
 
Of course, I have no idea what the descriptions mean.  With the connections I've made, here are the coil resistances.  Does it make sense?
 
[Image: https://farm8.staticflickr.com/7883/3288...ce72_c.jpg]
 
One inconsistency is that I disconnected one of the Bakelite caps, and it isn't 50pF as indicated on the schematic.  If my cap tester is right, then it's less than 10pF.


Messages In This Thread
Echophone S-4 Help Wanted - by Winky Dink - 01-16-2019, 01:31 PM
RE: Echophone S-4 Help Wanted - by Steve Davis - 01-16-2019, 03:34 PM
RE: Echophone S-4 Help Wanted - by Winky Dink - 01-17-2019, 01:41 AM
RE: Echophone S-4 Help Wanted - by Steve Davis - 01-17-2019, 01:32 PM
RE: Echophone S-4 Help Wanted - by Winky Dink - 01-17-2019, 01:47 PM
RE: Echophone S-4 Help Wanted - by Phlogiston - 01-17-2019, 04:19 PM
RE: Echophone S-4 Help Wanted - by Winky Dink - 01-17-2019, 05:40 PM
RE: Echophone S-4 Help Wanted - by Winky Dink - 01-21-2019, 07:40 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
under chassis parts locator diagram for 1938 Zenith 9s262
Has anyone gone to the trouble of creating an under chassis parts locator image?  Yes, I can identify components by foll...bobloney — 08:57 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Try looking at this site the book mark is for a old generator that I was given. David    https://radionerds.com/index.ph...David — 08:36 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Hello Everyone, I am looking for voltage identification for all the pin positions on the socket of a CRV-20130 power su...Tonym4704 — 08:16 PM
Philco P45-6365 Universal Transformer Instruction Manual
Can anyone guide me to where this may be found?GRG — 03:00 PM
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM

[-]
Who's Online
There are currently 2071 online users. [Complete List]
» 2 Member(s) | 2069 Guest(s)
AvatarAvatar

>