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

Thread Closed

Another National SW-54
#5

Hi Rich,
I just looked at the schematic for the Zenith 908. It is an interesting transition model,6 tubes, with an RF amp stage from about 1935, where some of the tubes are the newer number letter number and some are the older number only types. As you can see from my pictures I do not re-stuff the old caps, I merely replace them with brand new of equal or better voltage rating. Having been repairing old radios for more than half a century now, I follow an old habit of making it obvious what parts are new when I do a repair. That way, any future tech who works on it in another 60 or 70 years can see what was done and when. Making the caps look like they were original just confuses matters. That may be fine for a museum piece, but for general restoration, the parts are under the chassis and will never be seen except by whoever works on it next, so there is no real point to all that extra work, and, as I said, there are good reasons against it. Good luck with your endeavors. I hope you will post some pictures of your work here.
Mike


Messages In This Thread
Another National SW-54 - by mikethedruid - 01-18-2021, 09:58 PM
RE: Another National SW-54 - by Radioroslyn - 01-18-2021, 10:59 PM
RE: Another National SW-54 - by mikethedruid - 01-19-2021, 12:17 AM
RE: Another National SW-54 - by radiorich - 01-19-2021, 09:51 PM
RE: Another National SW-54 - by mikethedruid - 01-19-2021, 11:14 PM
RE: Another National SW-54 - by Arran - 01-20-2021, 02:47 PM
RE: Another National SW-54 - by mikethedruid - 01-20-2021, 07:04 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM

[-]
Who's Online
There are currently 1542 online users. [Complete List]
» 1 Member(s) | 1541 Guest(s)
Avatar

>