EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

Thomas Day
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  • Chicago, IL
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Thomas Day's Discussions

Allwave 23 sr#J497

Started this discussion. Last reply by Kent King Apr 29. 12 Replies

Hi All: I have posted about this set when I got it in 2015, and have some additional questions/information about it.This appears to be an in-between version from the 5 knob set to the 7 knob set, in…Continue

Allwave 23 oscillatorr bypass caps

Started this discussion. Last reply by Thomas Day Jan 6. 2 Replies

HI:I have seen a schematic or picture of the bypass caps added to the filament connections of the oscillator tube in the allwave 23. I thought I had printed it out but cannot find it. Are the caps…Continue

Allwave 23 RF alignment

Started this discussion. Last reply by Thomas Day Jan 24, 2017. 5 Replies

The directions for the RF alignment of the Allwave 23 say that you connect the generator to the antenna terminals thru the "proper dummy". Capacitor? value? For all of the alignments I have done over…Continue

Allwave 23 Chrome covers

Started this discussion. Last reply by David C. Poland Apr 15, 2016. 1 Reply

I have a set of chrome covers in good condition for the power transformer for the Allwave 23.I also have the transformer, but it has a shorted primary winding. If anyone is interested let me…Continue

 

Thomas Day's Page

Latest Activity

Thomas Day commented on Dave Pike's blog post Color Dial Window, Allwave 23
"HiDave:By now you have found the info on your radio. There are at least 2 schematics.I am fortunate to have a partner who is a graphic artist with a poster printer and have the 7 knob schematic blown up to 2 feet by 3 feet and framed. Since J…"
Jul 14
Thomas Day commented on Dave Pike's blog post Color Dial Window, Allwave 23
"Dave: Thanks for accepting my request. May I ask what the serial number is? In 2011 I bought an Allwave 23 in the Waverly cabinet. Photos on this site. I had to have a new power transformer built by Heyboer transformer in GrandHaven. I did a recap…"
Jul 13
Dave Pike left a comment for Thomas Day
"Hi Thomas, I have accepted your friend request! I live in SE Michigan, NW of Detroit. I have been collecting radios, stereo equipment, TV'S, most anything that contains vacuum tubes, for many, many years. I have recently acquired my first EH…"
Jul 13
Thomas Day replied to wayne topping's discussion I just acquired a Scott AW23 and I need a knob
" This is all very interesting. As I have posted before, I am in process of doing a total rebuild of J 497, which is a 5 knob version with the dual antenna posts and antenna coupler coil.  By complete, I mean all caps and resistors.…"
Jun 7
Kent King replied to Thomas Day's discussion Allwave 23 sr#J497
"I agree with Dave - I look closely at the set and if it appears to be original, I stay with what is there. Check the AW23 data in the Info Archive, there were several documented production changes described in the literature. Kent"
Apr 29
David C. Poland replied to Thomas Day's discussion Allwave 23 sr#J497
"My rule, if close inspection of solder joints and such so it looks original, stick with actual component values seen. But, there is a Scott service bulletin stating during servicing to replace the many the 400 volt .1  caps with 600 volt .05…"
Apr 29
Thomas Day replied to Thomas Day's discussion Allwave 23 sr#J497
"Working on J497 Allwave23 continues: I am in process of rebuilding this chassis, and finding some differences between the schematic and actual parts used.  The screen resistors for the 39/44 tubes are listed as 1K on both the schematics I have…"
Apr 29
Thomas Day replied to Cody Serucsak's discussion Aw15 questions
"This configuration was used by several companies including Hammond organ, which used two 12inch Jensens with different values for the field coils. They also used the quad 2A3 output tubes.  I had one of these amps in a Hammond tone cabinet.…"
Apr 17
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
Thomas Day replied to Lance Hughes's discussion SCOTT NAPIER ALLWAVE 12
"Lance: Check the back side of the outer rim of the speaker.  There may be a series of numbers printed there. Jensen and other makers identified them with these numbers.  The first two are the makers code, I think Jensen is #52. The next…"
Feb 27
Thomas Day replied to Thomas Day's discussion Allwave 23 sr#J497
"Thanks Kent and Norman: I found the silicon wire at a company called BNTECHGO in several different sizes and got 3 spools of #22, 24 and 20 in ten foot lengths. Very flexible. One of the 2400 ohm sections of the B stick divider is open, I will…"
Feb 20
Norman S Braithwaite replied to Thomas Day's discussion Allwave 23 sr#J497
"Thom: I use silicone rubber insulated test lead wire to replace the original rubber wire.  It is available in similar gauges of wire and diameters of insulation and will outlast other types of rubber.  Like Kent, I have many parts and…"
Feb 19
Kent King replied to Thomas Day's discussion Allwave 23 sr#J497
"Interesting...is the power resistor open? I've seldom seen a bad divider in the AW23 sets. I don't part our salvageable sets, the ones on my parts line are way too far gone - often, they were missing major parts when I picked them up. I…"
Feb 19
Thomas Day replied to Thomas Day's discussion Allwave 23 sr#J497
"Hi Kent: Thanks for the reply. I think this set is factory original, since modifying it to the later twin antenna system would be difficult at best. I found a source for the trimmer caps, but thanks for the offer. I also found a Pro Wire source for…"
Feb 19
Kent King replied to Thomas Day's discussion Allwave 23 sr#J497
"Thom - I have lots of parts chassis, if you can send me a pic or indication of which trimmer you need, I can pull one off a parts chassis. Anything else you need too...just let me know. It's possible your set went back to the factory and got…"
Feb 17
Thomas Day replied to Thomas Day's discussion Allwave 23 sr#J497
"Starting to work on J497 Allwave 23. One of the trimmers on one RF coil is missing. Parts info says it is a 100pf trimmer. I can find them, but just a question if that value is the total value and adjustable from there? Also the schematic lists a…"
Feb 17

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Comment Wall (7 comments)

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At 2:14pm on July 13, 2021, Dave Pike said…
Hi Thomas, I have accepted your friend request! I live in SE Michigan, NW of Detroit. I have been collecting radios, stereo equipment, TV'S, most anything that contains vacuum tubes, for many, many years. I have recently acquired my first EH Scott radio, a 7 knob Allwave 23, in Warrington cabinet. I have experienced and admired Scott radios for years, since I was first aware of them, over 30 years ago! Always wanted at least one, for my collection, and finally found an affordable one! I have my set basically working, I have to recap the tuner, which I will be doing, as soon as I buy more capacitors.
At 10:07pm on September 9, 2018, Brian Sherrod said…

Hi Thomas, right after I posted my thread I discovered my model is a 310, not a 510.  I was relieved since the 310 did not have the power amp to begin with, and I thought mine was missing.  I removed my thread due to that since it was wasted space...  

Thanks for the comment and tip.

At 7:47pm on November 1, 2013, Dan Fox said…

Thanks again-I will give this information to my friend who has the chassis on his bench right now (waiting for condensers).  I have lived in Muskegon 25 years, and while I have been to the Frauenthal many times, I have never had a chance to go when the Damfinos get together.  That Barton pipe organ looks like a bear to operate!  An old aquaintance of mine, Cliff Martin, played it for many years.

At 9:31pm on October 31, 2013, Dan Fox said…

Thanks, Thom, you were right-I am looking for a .25mfd @1250v, not 25mfd (wouldn't be the first time I've missed the point!).  Which leaves me with the same problem-where can I find one?

At 8:05pm on May 23, 2011, Kent King said…
At 8:04pm on May 23, 2011, Kent King said…

Thom - Actually, it was Norman Braithwaite that put the checklist on here. I don't have a link handy right now, but I'll try to find it and post a link here...

Kent

At 5:28pm on April 28, 2011, David C. Poland said…

Look for a current drain.

 

My first AW-23 had a shorted primary when I acquired it 15 years ago. (I should have been suspicious of the 10 amp primary fuse  ...  like maybe a proper 3 amp fuse would blow.). Anyway, I recapped it before powering up the first time on my variac. The proper size fuse  would blow when my variac reached about 40 volts. I eventually obtained another power transformer from a rough amp, and the radio ran great. Then a year or so later the fuse blew Christmas day, after it had been playing 3-4 hours ..... same problem as before, blowing the fuse at moderate variac voltage.

 

The ultimate problem turned out to be in the speaker. The red B+ wire inside the pedestal from the speaker terminal strip to the field coil was laying across the point of a screw and made a partial connection at high voltage through the worn insulation. Excessive current was not quite enough to blow the fuse but enough to overheat the transformer,  progressively cooking  the transformer until the primary failed blowing the fuse the day I ran it several hours. I found the problem by close visual inspection of the routing of the wires in the speaker. Corrected the wire location, and the power transformer #3 has worked out fine for many years.

 
 
 

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