EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

John Perry
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  • Indianapolis, IN
  • United States
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John Perry's Discussions

AW23 Power supply rebuild

Started this discussion. Last reply by John Perry Mar 30. 9 Replies

GreetingsAnyone know if I should replace the 4 .13 @200 paper caps with .047. It was recommended to use .047to replace all paper caps on the AW23 rebuild. Does that include the power supply as…Continue

Scott AW23 tuner rebuild (pots)

Started this discussion. Last reply by John Perry Mar 19. 5 Replies

I am almost done with the tuner. Had a question about the pots Volume etc. These look like they may be sealed. Usually I flush them out with CRC contact cleaner blow it out with can air. Then follow…Continue

Scott Allwave 23 Restoration

Started this discussion. Last reply by John Perry Nov 1, 2019. 7 Replies

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

 

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Latest Activity

John Perry replied to John Perry's discussion AW23 Power supply rebuild
"   OK thanks David"
Mar 30
David C. Poland replied to John Perry's discussion AW23 Power supply rebuild
"John, regarding rebuilding the dual .25 mfd unit ahead of the the 10 and 30 Henry chokes in the amp, be sure to use high voltage caps. 630 volts is not NOT high  enough. Scott used 1250 volts caps here in the dual unit. I suggest higher,…"
Mar 28
Kent King replied to John Perry's discussion AW23 Power supply rebuild
"John - Yes, the AW23 sets are all the same, the power supplies are interchangeable. The set pins just need the 250v B+, the 20V bias voltage, ground, 6v filament and the two output Plate returns. That's the 7 pins... Kent"
Mar 27
John Perry replied to John Perry's discussion AW23 Power supply rebuild
"Good info thanks. Are all of the AW23 Power supplies interchangeable? I have a Q458 and an N535 serial no. Im rebuilding the 458 now. Im trying to decide if I should do some re-stuffing or just mount new parts where I can. Curious to see how others…"
Mar 27
Kent King replied to John Perry's discussion AW23 Power supply rebuild
"I'm going to add a VERY unusual problem I encountered today with an AW23. The set was playing well after recapping and alignment, except...every once in awhile, the dial light and all the tuner tube filaments would go dark. Usually after it ran…"
Mar 26
John Perry replied to John Perry's discussion AW23 Power supply rebuild
"Good to know thanks  Norman"
Mar 23
Norman S Braithwaite replied to John Perry's discussion AW23 Power supply rebuild
"The 0.13 mfd capacitors are part of a 10-khz filter.  Changing the value of these will change the frequency of the filter.  The filter was included to prevent the carrier of an adjacent station from causing a whistle when listening to…"
Mar 23
John Perry replied to John Perry's discussion AW23 Power supply rebuild
"Thom I usually do 40s and 50s radios. This is only my 2nd 30s radio. Except for a Stromberg Carlson 225h I restored. I like the Scott AW23. Cant wait to get it powered up. Thanks for your good input. John"
Mar 23
Thomas Day replied to John Perry's discussion AW23 Power supply rebuild
"John: When i rebuilt my first Allwave 23 I followed the schematic and replaced caps with .1 uf 600volt.  Except for the few that were .05.  I am working on a second Allwave 23 and replacing the caps with the values I find when I take the…"
Mar 23
John Perry posted a discussion

AW23 Power supply rebuild

GreetingsAnyone know if I should replace the 4 .13 @200 paper caps with .047. It was recommended to use .047to replace all paper caps on the AW23 rebuild. Does that include the power supply as well?On my tuner most were already .05 but there was 2-3 that were .1. Connected to the pots I think. ThanksJohnSee More
Mar 23
John Perry replied to John Perry's discussion Scott AW23 tuner rebuild (pots)
"Thanks Kent! That sounds like good practice. Odd thing was I also have an N535 serial # 23. It had 1 long and 1 short in the tuner Chrome cover. I was thinking maybe they were keeping it as short as possible on the one closer to the center. To keep…"
Mar 19
Kent King replied to John Perry's discussion Scott AW23 tuner rebuild (pots)
"I just took a 23 apart last night. In this set (which has been worked on previously), the longer screws hold the tuning capacitor. The two on the smaller cover were the same length (fairly short).The longer of those were on the tuner cover. As long…"
Mar 19
John Perry replied to John Perry's discussion Scott AW23 tuner rebuild (pots)
"Also I should have been more careful marking screws. On the tuner condenser there are 3.(I put in the longer ones there) Chrome tuner cover 2 plus a nut.(think it had one long and one short not sure) And the other square antenna coil ( I think)…"
Mar 19
John Perry replied to John Perry's discussion Scott AW23 tuner rebuild (pots)
"Thanks"
Mar 18
Kent King replied to John Perry's discussion Scott AW23 tuner rebuild (pots)
"The pots Scott used are fairly tight and many don't suffer from dusty noises...I still spray them gently with an electronic contact cleaner and run them back and forth a few times. Try the set when you get it done and see how the controls…"
Mar 18
John Perry posted a discussion

Scott AW23 tuner rebuild (pots)

I am almost done with the tuner. Had a question about the pots Volume etc. These look like they may be sealed. Usually I flush them out with CRC contact cleaner blow it out with can air. Then follow up with Deoxit  F5 ( because it has more lube than the D5 ) or ( CRC 2-26 spray lube ). I dont do a lot of 30s radios. Any suggestion on how to maintain the pots?Also polished up all the chrome with chrome polish. That is quite a job but it looks really good. Most of it is in good shape except for a…See More
Mar 18

John Perry's Blog

AW23 Tuner rebuild.

Posted on March 14, 2021 at 10:19pm 2 Comments

Greetings Working on the AW23 tuner rebuild.

I replaced the grid cap wire on the ifs. Can I leave it a few inches longer and tuck it back in the can (Im using test probe wire its super flexible) or should they be as short as possible.

Also the condenser trimmers on the ifs have a lot of powdery oxidation.  Any suggestions on cleaning? was thinking of alcohol and a flux brush. Or should I just leave it alone? 

Thanks

John

AW23 Tuner rebuild.

Posted on February 8, 2021 at 6:49pm 9 Comments

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

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