Philco model 18 (code 121) - HELP!
Posts: 4,950
Threads: 54
Joined: Sep 2008
City: Sandwick, BC, CA
The other electrolytic can, the one under the chassis, can be replaced by three poly film caps if desired as they are small values. Whether they would fit inside the original can is another story but they are available and will survive much longer then replacement electrolytic caps. They can be purchased from Radio Daze and Mauser.
With regards to a positive side going to ground this is something to be careful with, there are some filter caps that have a common positive with two negative sides where a bias resistor network and speaker field coil will be connected in series with the negative side, the field coil acts as a filter choke and the resistors as a bias voltage divider.
Regards
Arran
(This post was last modified: 02-08-2013, 10:56 PM by Arran.)
Messages In This Thread
RE: Philco model 18 (code 121) - HELP! - by Arran - 02-08-2013, 10:49 PM
Users browsing this thread: 2 Guest(s)
|
|
Recent Posts
|
|
Philco 42-345 Restoration/Repair
|
| Ok MrFixr55,
I have tried the DeoxIT D5 on the band switch and even though it has relieved the tension I felt when turn...osanders0311 — 11:11 AM |
|
Part numbers to model cross
|
| Is there a reference somewhere where you can punch in Philco part numbers and see what models those parts were used in?Jim Dutridge — 10:17 AM |
|
Philco 42-345 Restoration/Repair
|
| Hi OSanders,
Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM |
|
5U4 vs 5Z4 tubes
|
| I think that RCA and GE introduced metal tubes in the USA in 1936. I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM |
|
Philco 42-345 Restoration/Repair
|
| Vlad95,
Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM |
|
5U4 vs 5Z4 tubes
|
| A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM |
|
Philco 42-345 Restoration/Repair
|
| Thanks Rod,
"When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM |
|
Philco 42-345 Restoration/Repair
|
| RodB
:beerchug:Vlad95 — 10:22 AM |
|
Philco 42-345 Restoration/Repair
|
| Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM |
|
5U4 vs 5Z4 tubes
|
| Well this is a Hallicrafters SX/9 circa 1936.
No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM |
|
Who's Online
|
There are currently 472 online users. [Complete List]
» 1 Member(s) | 471 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
