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

Thread Closed

Rehabing 42-854 AM/SW Portable
#1

So after rebuilding the 5 section filter cap I started in on the paper caps I could get to. Most were in the power supply and audio sections. After doing that I thought I'd give her a try and see what happens. So power up and nothing. 117Z6 was doing fine and making HV but no audio at all. Checked the filament voltage and had 0. On these portable set the filament voltage is derived from the HV though a resistor divider network. Well guess what #56 was open, that's half of the divider the other half is #48. Went into the deep dark basement and found a couple of resistor that could may up to open one ( it's a power resistor about 5w or so). Clipped those in and the filament sprang to life. So now I've got audio but haven't fed any signals into the IF of mixer to hear what else is working. Started moving some coils out of the way so I can get at the last few caps and check resistors. The second pic is of #56 it's open.
http://www.nostalgiaair.org/pagesbymodel...013562.pdf

Terry


Attached Files Image(s)
       


Messages In This Thread
Rehabing 42-854 AM/SW Portable - by Radioroslyn - 05-22-2016, 02:08 PM
RE: Rehabing 42-854 - by morzh - 05-22-2016, 02:29 PM
RE: Rehabing 42-854 AM/SW Portable - by sam - 05-23-2016, 02:33 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 05-23-2016, 04:40 PM
RE: Rehabing 42-854 AM/SW Portable - by sam - 05-26-2016, 06:55 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 05-26-2016, 08:06 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 05-26-2016, 08:45 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 05-27-2016, 08:06 AM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 05-27-2016, 11:11 AM
RE: Rehabing 42-854 AM/SW Portable - by sam - 05-27-2016, 11:31 AM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 05-27-2016, 06:44 PM
RE: Rehabing 42-854 AM/SW Portable - by sam - 05-27-2016, 08:21 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 05-27-2016, 08:44 PM
RE: Rehabing 42-854 AM/SW Portable - by sam - 05-30-2016, 07:07 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 05-31-2016, 07:22 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 06-01-2016, 08:04 AM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 06-02-2016, 01:19 PM
RE: Rehabing 42-854 AM/SW Portable - by sam - 06-02-2016, 12:05 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 06-02-2016, 07:52 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 06-02-2016, 09:20 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 06-02-2016, 09:58 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 06-04-2016, 02:09 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 06-04-2016, 04:18 PM
RE: Rehabing 42-854 AM/SW Portable - by sam - 06-16-2016, 10:13 PM
RE: Rehabing 42-854 AM/SW Portable - by morzh - 06-17-2016, 10:32 AM



Users browsing this thread: 2 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 2202 online users. [Complete List]
» 1 Member(s) | 2201 Guest(s)
Avatar

>