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

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

National NC-60-Special
#1

Back in October I bought this National NC-60-Special. It is a glorified All American 5 circuit, and a successor to the National SW-54. It was made to compete with the Hallicrafters S-38E. If you look at the circuit you will see the striking similarity, right down to the "gimmick" used to provide feedback in the IF stage. Here is the schematic, I pieced the two halves together since they are on two different pages in the manual...

[Image: https://64.media.tumblr.com/384cc27bf411...603517.jpg]
Here is what the radio looked like before I began any work...

[Image: https://64.media.tumblr.com/12e973c8648f...9f0377.jpg]

[Image: https://64.media.tumblr.com/1958ba3c8fc1...62fbee.jpg]

I have ordered a number of condensers for the radio, and will have to wait for them to arrive. Other than that I have begun work by removing the chassis, doing some cleaning of the topside, removing the tubes for testing, and replacing the speaker which was pretty bad. I happened to have one of the right size and resistance in stock, which made it easy...

[Image: https://64.media.tumblr.com/cbfc38801e42...018022.jpg]


Messages In This Thread
National NC-60-Special - by mikethedruid - 11-10-2021, 07:04 PM
RE: National NC-60-Special - by PhilcoMike - 11-11-2021, 05:22 PM
RE: National NC-60-Special - by mikethedruid - 11-11-2021, 07:15 PM
RE: National NC-60-Special - by PhilcoMike - 11-12-2021, 01:08 PM
RE: National NC-60-Special - by tbone - 11-14-2021, 07:26 PM
RE: National NC-60-Special - by mikethedruid - 11-15-2021, 04:22 AM
RE: National NC-60-Special - by Eliot Ness - 11-15-2021, 09:19 AM
462ron - by 462ron - 11-15-2021, 12:37 PM
RE: National NC-60-Special - by Radioroslyn - 11-15-2021, 03:52 PM
RE: National NC-60-Special - by mikethedruid - 11-15-2021, 04:21 PM
RE: National NC-60-Special - by mikethedruid - 11-15-2021, 05:27 PM
RE: National NC-60-Special - by Radioroslyn - 11-15-2021, 08:45 PM
RE: National NC-60-Special - by mikethedruid - 11-15-2021, 10:25 PM
RE: National NC-60-Special - by radiorich - 11-15-2021, 11:30 PM
RE: National NC-60-Special - by mikethedruid - 11-18-2021, 11:03 AM
RE: National NC-60-Special - by EdHolland - 12-01-2021, 10:35 PM
RE: National NC-60-Special - by PhilcoMike - 12-02-2021, 04:14 PM
RE: National NC-60-Special - by mikethedruid - 12-02-2021, 04:49 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM
Philco model 38 code 121 not receiving signal.
Well why not! :lol:Stormlord5500 — 03:14 PM
Philco model 38 code 121 not receiving signal.
Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM
Testing a speaker and output transformer Trutone A2-G
morzh Short-circuited turns can be considered as a half-dead transformer. But on this case transformer will hot and s...Vlad95 — 11:01 AM
Testing a speaker and output transformer Trutone A2-G
I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM

[-]
Who's Online
There are currently 2160 online users. [Complete List]
» 1 Member(s) | 2159 Guest(s)
Avatar

>