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

Thread Closed

1948 Philco C4608/ Mopar 802 radio
#1

Hi guys,
Its been quite a while since I've posted anything here. Between getting Mom settled in the nursing home and selling her house and catching up on stuff that got put on hold while taking care of her, I haven't had much time to work on radios.
 Well I'm restoring the radio in my 1948 Plymouth, thought it would be a fun project now that winter is coming. I've recapped the whole radio and replaced most of the resistors and I've installed a new solid state vibrator and replaced the missing speaker with a modern equivalent. 
Here are the problems I'm having,
When hooked up to a fully charged 6V. battery (positive ground) and turned on, I immediately get a loud buzzing from the speaker, the tone of the buzz does change a bit as the set warms up but does not go away. I can also vary the tone slightly by rotating the tone control, but no stations are heard. I get static and clicks when touching my meter leads to tube pins, so I'm guessing the amp section is working. I tried hooking up my signal generator and I did hear a faint tone at one point. I was able to vary the loudness slightly by tweaking the IF transformers.
Also my B+ voltages are about 30 volts lower than the schematic lists. As I said I have replaced all the caps including the electrolytics using the same values.
I've just started troubleshooting and I ordered a Sams Photofact for it as the one on Nostalgiaair is kind of confusing to me and hard to read.
I'm not very familiar with old car radios so if anyone out there has any ideas or tips on what I should be looking at, I would GREATLY appreciate it! Thanks!!!!
Kevin


Messages In This Thread
1948 Philco C4608/ Mopar 802 radio - by 37silverstreak - 12-13-2017, 04:19 PM
RE: 1948 Philco C4608/ Mopar 802 radio - by morzh - 01-18-2018, 04:57 PM
jloban - by jloban - 06-16-2022, 11:22 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 1963 online users. [Complete List]
» 1 Member(s) | 1962 Guest(s)
Avatar

>