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

Thread Closed

Model 84, code 121 question(s)
#1

Found a nice, unmolested example of the 1934 cabinet design at the WARCI meet Sunday, and have a few questions with regards to the electronic restoration. First, for reference, here's a link to the PDF file schematic from Nostalgia Air. I've ordered "good" copies from Chuck: http://www.nostalgiaair.org/PagesByModel...013875.pdf

My first concern is this wire that is either cut or more likely broken off. It's attached to the OSC coil (I pointed to the lead the end of the wire is soldered to) You can see the broken end in the upper right hand corner of the pic:
   

Here is the broken off end, which appears MAY have come from the off/on/volume control? :
   

Here is a full view of the bottom of the chassis, pointing to the broken wire:
   

I'm hoping this set won't have the same OSC coil nightmares as the model 89's do. As with that set, if anyone has any info on the 84 as far as which terminals on the coil are the primary and secondary windings and (hopefully I won't need it) the number of turns of wire for each and direction to wind?

The other question concerns the electrolytic can containing an 8 mfd and a 10 mfd:
   
It appears to me that the terminal on top directly under the large resistor is the ground. There's green paint next to the terminal. Is that correct? Also, it appears to be a 'floating ground', as it's only grounded within the can itself, and not on the chassis (as there is a cardboard ring around the outside of the can). Is that the true ground, where everything on that terminal would be connected to the negative end of the replacement electrolytics?

Sorry for the dumb questions. Until I get a better, readable schematic, I'm at a loss, but I know there are some very knowledgeable and helpful Phorum members who I'm sure have tackled one of these small cathedrals at some point. Thanks!

Greg V.
West Bend, WI
Member WARCI.org


Messages In This Thread
Model 84, code 121 question(s) - by NostalgiaRadioTime - 06-03-2014, 07:40 PM
RE: Model 84, code 121 question(s) - by morzh - 06-03-2014, 08:47 PM
RE: Model 84, code 121 question(s) - by morzh - 06-03-2014, 10:05 PM
RE: Model 84, code 121 question(s) - by morzh - 06-04-2014, 08:58 AM
RE: Model 84, code 121 question(s) - by morzh - 06-04-2014, 01:33 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
hello david, I have a similar generator in my collection that features a cast iron, single-cylinder Briggs & Stratt...radiorich — 01:00 AM
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

[-]
Who's Online
There are currently no members online.

>