"Hello-I have been using a quad of LinLai 2A3s in my AW23 for years with very good results, despite being the least expensive version of the current Chinese production. I had plenty of reservations, but decided to go for it anyway and bought…"
The Fine Things are Always Hand Made
David McGee 's Discussions
Advice on RCA 2A3 tubes for Allwave15
Started this discussion. Last reply by Troy Taylor on Monday. 9 Replies 1 Like
I am still trying to repair my Allwave15. During a slow power-up my two 2A3 tubes heated up normally. But I found out that my speaker coils are bad and I am getting it rewound right now. In the…Continue
Repair of Allwave15 speaker field coil and transformer.
Started this discussion. Last reply by David McGee Aug 1. 2 Replies 0 Likes
I've been trying to restore for about a year my grandfather's Allwave15. I've made a lot of progress but hit a wall with the speaker. When I power up all the tubes seem to work fine but I get zero…Continue
Recapping a bathtub choke and condenser assembly in allwave15
Started this discussion. Last reply by mike hadley Feb 27. 2 Replies 1 Like
I'm new to the Forum. I'm recapping Allwave 15 and need guidance on how to recap the three choke and condenser assemblies (nos. 92, 93 and 94. thanksContinue
David McGee 's Page
Latest Activity
"I forgot your title stated RCA brand 2A3's. RCA would be high quality tubes and a favored brand if you were to observe sales on eBay.
The RCA's are replacements, so newer than the radio and probable good. All indications are that Scott…"
"It is not unusual for consumer grade emission type tube testers to pin the meter on strong tubes. Of potential concern, however, are misaligned elements and gas which can both cause a tube to have higher than normal emissions. Misaligned…"
"It may be the settings for the tubes on that tube tester...you will not harm the set unless the tubes show a short. Given the cost of 2A3 tubes, I would still try them in the set.
Regarding the SOVTEK 2A3s, most folks report adequate results, some…"
"Pegging the meter rather than merely exceeding the target reading for a new tube seems very wrong. Seems unlikely both tubes are off the chart high. Are they the same brand and a US brand like Sylvania, RCA, TungSol etc?But, because you had the same…"
"I misstyped the filament voltage setting I used. It is 2.5. "
"Also, my main voltage from the wall is 121.9v"
"Thanks for the good suggestions. I did recheck the tester settings. The filament is 2., the grid is 17 and the plate is 82. I don't have any other 2A3s other than these two that were already in the power amp. I also did…"
"double check your tube testor settings, especially the filament voltage selection control.. Do you have any other 2A3 tubes for comparison?
or any other 2.5 volt tubes. What happen testing a 6 volt output tube - results seem…"
Advice on RCA 2A3 tubes for Allwave15
I am still trying to repair my Allwave15. During a slow power-up my two 2A3 tubes heated up normally. But I found out that my speaker coils are bad and I am getting it rewound right now. In the interim I tested both 2A3 tubes for "merit" on my Eico 666 tube tester they both pegged the needle past "Good". All other tests were normal. I've heard conflicting comments on what that means. Are these tubes likely good or bad? If bad can I substitute new Soviet 2A3 tubes since they are much…See More
"Thanks so much for your help. I really appreciate it."
"FYI - the 2nd field coil is NOT a hum bucking coil. Suggest you carefully study the diagram for the amp and speaker. I have had half dozen AW-15's over the years. The speaker is a special design (by Jensen) for Scott.
The 2175 ohms field coil…"
Repair of Allwave15 speaker field coil and transformer.
I've been trying to restore for about a year my grandfather's Allwave15. I've made a lot of progress but hit a wall with the speaker. When I power up all the tubes seem to work fine but I get zero sound out of the speaker. As best I can tell, the speaker transformer is not working correctly and the field coil isn't either. The hum bucker seems to be ok. I have seen references to installing a filter choke and power resistor to avoid having to get the field coil rewound. Is this a good…See More
"Hi David,
I posted on a thread a while ago
https://ehscott.ning.com/forum/topics/allwave-15-tar-caps-necessary-to-change?xg_source=activity
hopefully that should tell you what you need to know
Mike"
"I have never rebuilt those 3 larger bathtub caps on the rear apron of a Scott AW-15 or AW-12 receiver from the early 1930's. I have restored several of each. They are in low voltage cathode circuits in the IF stages and I did not want to…"
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