crazy issue 41-604 works fine with dim bulb
Posts: 1,600
Threads: 101
Joined: May 2008
City: Omak
State, Province, Country: WA
Hello Guys,
One of the guys I know in our hobby is having problems with his newly restored Philco 41-604 when he brings it up on full line voltage the set starts acting up but if he runs it on Dim bulb it works just fine . https://philcoradio.com/library/download...20Book.pdf
Anyway Ideas .
Sincerely Richard
(This post was last modified: 11-06-2023, 01:16 AM by radiorich.)
Posts: 4,707
Threads: 51
Joined: Sep 2008
City: Sandwick, BC, CA
Define acting up? It looks like an AC/DC set judging by the diagram. I'm really just shooting in the dark here without having an idea of what is going on, but if all the capacitors have been replaced, correct values, correct voltage ratings, in the correct places, then it could be something like a gassy tube, or secondary emission from a grid. It also could be that a carbon comp resistor is failing, more voltage, more heat, and the connection inside is breaking down.
Regards
Arran
(This post was last modified: 11-06-2023, 03:03 AM by Arran.)
Posts: 1,600
Threads: 101
Joined: May 2008
City: Omak
State, Province, Country: WA
Hello Arran,
Yes He replaced all the capacitors !
Sincerely Richard
Posts: 15,819
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
Rich
I will repeat Arrans request:
- Define "acting up".
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Posts: 1,600
Threads: 101
Joined: May 2008
City: Omak
State, Province, Country: WA
Hello Arran and Morzh,
Here is what he wrote me " By act up, I mean it squeals and distorts between strong stations. Also, I have a strong station that shows up at multiple different frequencies."
he just ordered an NOS 7C6 tube because the original tube seems to have an intermittent issue.
Sincerely Richard
Posts: 694
Threads: 8
Joined: Apr 2018
City: S. Dartmouth
State, Province, Country: MA
Quote:By act up, I mean it squeals and distorts between strong stations. Also, I have a strong station that shows up at multiple different frequencies."
I would look to miss connections, wrong cap/resistor values, shorts between terminals, solder blobs, wire snips, solder flowed between tube wafer contacts, poor riveted joints to chassis, even if the "best ohmmeter" says the joint is O.K. There could be corrosion issues with the coils, if resistance readings are higher, then there is a problem. The band switch must be cleaned with 91% alcohol and gently blown dry, use of "miracle" contact cleaners can result in leakage. Poor connections in the band switch could also be a possibility...
Re-wiring and not following the route of the original wires, especially in the RF/OSC and around the volume control, missing tube shield(s).
Overall, if the "shotgun method" was used to refurbish, that, in of itself, is responsible for the outcome.
It generally takes stage by stage analysis after eliminating a power supply issue if any to recover from cited issues.
Poking the chassis components with a tongue depressor, with set in operation, will often reveal oscillations occurring from juxtaposition.
GL
Chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
Posts: 15,819
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
>>Poking the chassis components with a tongue depressor,
Chas,
Tongue depressors only depress tongues...and their owners. 
Posts: 1,600
Threads: 101
Joined: May 2008
City: Omak
State, Province, Country: WA
hello Morzh,
Yes I had to to poke and press items on modern printed circuit boards to get sets to act up also the use of cold spray and heat .
Sincerely Richard
(This post was last modified: 11-08-2023, 07:53 PM by radiorich.)
Posts: 694
Threads: 8
Joined: Apr 2018
City: S. Dartmouth
State, Province, Country: MA
Quote:Tongue depressors only depress tongues...and their owners.
Many, many common "tools" can be "MacGyver'd" into service to serve another purpose. I also use the T.D. whittled a bit to apply wood filler in difficult places. One end sharpened to a point it becomes a marker in the flower bed...
To suggest the use of a pencil to poke a circuit has some risk, I could suggest a Delrin or Teflon rod but not many have a such laying about. A wooden dowel, fine, even the "Popsicle" stick, after consuming the quiescently frozen confection and drying the said stick.
Chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
Posts: 1,976
Threads: 147
Joined: Jan 2013
City: Westland, MI
I prefer a bamboo chopstick for poking around looking for issues. Usually get them with an order to go at our local Chinese restaurant. Kills two birds with one stone! Take care and BE HEALTHY! Gary
"Don't pity the dead, pity the living, above all, those living without love."
Professor Albus Dumbledore
Gary - Westland Michigan
Posts: 15,819
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
>>Kills two birds with one stone!
Exactly. First you use them to eat your Peking Duck, a bird #1.
Then you tap on the chassis of that one.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Users browsing this thread: 1 Guest(s)
|
|
Recent Posts
|
|
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
|
| Hi Cap'n Clock,
Unfortunately, I do not have this radio. This is a shame because this should be a good performer. 2A5...MrFixr55 — 06:48 AM |
|
American Bosch Model 802 auto radio
|
| I think it would come under either American Bosch or United American Bosch. American Bosch made sets for the American We...Arran — 05:53 AM |
|
trying to identify this wire type
|
| Thanks to all for the feedback. As Arran said, it is probably an older replacement and yes it has a grid cap so I will ...georgetownjohn — 09:32 PM |
|
trying to identify this wire type
|
| It's possible that the red wire, actually a grid cap lead, is a very old replacement, I can't remember seeing a pre 1939...Arran — 09:18 PM |
|
Gilfillan Brothers Car Radio?
|
| Hi everyone,
Special thanks to Joe Rossi for tracking down this obscure radio and thanks to others who took up the hun...Antipodal — 08:15 PM |
|
trying to identify this wire type
|
| Here's one source for your wire of many.
Take care and BE HEALTHY! Gary
P.S. Can't get the right color you need? I ...GarySP — 06:40 PM |
|
trying to identify this wire type
|
| ...and modern wire of the appropriate gauges and insulation V-rating (300V minimum, usually shown right on the wire) is ...morzh — 05:47 PM |
|
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
|
| I have a question about this radio, is there anyone that has access to this radio that has an intact unmolested speaker ...captainclock1988 — 04:28 PM |
|
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
|
| Well what makes me confuse all of those companies is that all three of those companies (Setchell-Carlson, Stromberg-Carl...captainclock1988 — 04:21 PM |
|
trying to identify this wire type
|
| The red wire is rubber covered wire.
The others are cotton braid over rubber often in colors or a tracer, also strand...Chas — 02:43 PM |
|
Who's Online
|
There are currently 6246 online users. [Complete List]
» 1 Member(s) | 6245 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
