"Thanks David for the input. I had oxidation and wasn't getting good continuity. I lightly cleaned with a fiberglass pencil. Dont think I removed much. If I had to I could re-plate the silver. Hopefully its OK. There is a wear line on the wiper…"
The Fine Things are Always Hand Made
John Perry's Discussions
Scott Allwave 23 Restoration
Started this discussion. Last reply by John Perry Nov 1, 2019. 7 Replies 0 Likes
GreetingsI am restoring an AW23 tuner, PS and base speaker.I got a few good tips from Kent and Dave a while back.1. Use test lead wire to replace bad rubber wire2 Use .047 for all the wax caps…Continue
John Perry's Page
Latest Activity
"Yes -replacing all those receiver caps with .047 caps at 600 (or today, 630 volts) is correct for an AW-23. Scott switched to 600 volt .05 caps sometime in 1936 production. There is a Scott service bulletin during any service to replace the…"
"Hi Scott
Yes that sounds reasonable. Not sure how it will act after a rebuild. Also All my wax/paper caps are being replaced/upgraded with .047s Not sure what effect that will have on the trimmers.
John"
"I have an AW23 that has the trimmer screw missing and it is bent open. I have not worked on it yet, but I'll bet that they needed to lower the capacitance more than the screw adjustment would allow. "
"Antenna rotor contacts.
Some of my contacts are not getting much movement or none are the wiper goes through. Same with the ball that wipes across the bottoms. I am making small adjustments being very careful. I am happy with how it is now except…"
"Thanks for the info
Dont see any other paperwork inside but that sounds about right.
There is a notice sticker on the bottom plate (English,Spanish and French)as well . Its says it was calibrated at the factory and if removed warranty would be void…"
"John -
You can run them without tweeters, but be sure to move the "dummy" speaker plug to the opposite side of the speaker base. The plug adds a resistive load when the tweeters are not used. Leaving it on the "tweeter" side will…"
"Thanks Kent
Interesting thing the N535 Has writing in pencil on the bottom of the tuner pan
3/24/1937 N-535 then underlined 8578 not sure if thats from a tech or factory
Sounds like it was later.
Also do you know if its OK to test the unit without…"
"John -
I had the same thing happen on an AW15 I worked on not too long ago. The inner coil fell out of the outer coil. Like you, I put it back into the tube and secured it, set restored just fine. Regarding the trimmer being wide open - I…"
AW23 Tuner rebuild.
Hello allI am picking back up on on a project from a while backI have a Tasman fully populated with tweeters S#N535An extra tuner,PS and speaker S#Q458I am rebuilding tuner Q458 first.Pulled the antenna coil to replace the rotor area wiring.The inner coil with the 2 fine wires fell out of the tube. It tugged on them a bit but they didnt break.I put a small piece of painters tape on the sides of the wooden plug and shoved in back in the large coil tube.It fits in snug now. It ohms out at around…See More
"Thanks Kent
I will follow your advice.
John"
"When replacing the 3 wires running from the switch assembly in the center can to the SW coils...I find it is easiest to carefully remove the switch rotor, unscrew the phenolic plate and unsolder/replace the wires away from the set, then pass them…"
"That is reasonable. That is pretty much what I would do.
Norman "
"Ok thanks
Maybe I will just replace the dog bones and leave the others if they are reasonably in tolerance."
"The dog bone resistors used by Scott in the earlier AW-23 sets are very unreliable. The cylindrical resistor is a carbon film resistor that is usually very reliable. The carbon film resistors fail open.
Norman"
"Thanks Norman
On the photo with the if diode assembly. the 1k ohm (#367) is a dog bone measures 1.6k
The other resistor looks like a large brown carbon one but marked like a dog bone it should be 10 k (#373) and shows 8700. I assume thats the…"
John Perry's Blog
AW23 Tuner rebuild.
Posted on February 8, 2021 at 6:49pm 9 Comments 0 Likes
Hello all
I am picking back up on on a project from a while back
I have a Tasman fully populated with tweeters S#N535
An extra tuner,PS and speaker S#Q458
I am rebuilding tuner Q458 first.
Pulled the antenna coil to replace the rotor area wiring.
The inner coil with the 2 fine wires fell out of the tube. It tugged on them a bit but they didnt break.
I put a small piece of painters tape on the sides of the wooden plug and shoved in back in the large coil… Continue
I am picking back up on on a project from a while back
I have a Tasman fully populated with tweeters S#N535
An extra tuner,PS and speaker S#Q458
I am rebuilding tuner Q458 first.
Pulled the antenna coil to replace the rotor area wiring.
The inner coil with the 2 fine wires fell out of the tube. It tugged on them a bit but they didnt break.
I put a small piece of painters tape on the sides of the wooden plug and shoved in back in the large coil… Continue
© 2021 Created by Kent King.
Powered by
