"I got in front of me the schematic of the Model FM Tuner. Looking at the mixer (6sa7) the 10 mmfd is in parallel to the oscillator col and 25 mmfd trimmer. If you look to the left of the 10 mmfd capacitor you will see a 50 ohm resistor…"
The Fine Things are Always Hand Made
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Robert Meader
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Robert Meader's Discussions
AW23 coil Platter
Started this discussion. Last reply by Kent King Aug 16. 3 Replies 0 Likes
Are all the coil platters the same for the aw23? There 5 knob and 7 knob Aw23 do they use the same coil platter? I attached two pictures. One picture shows the two AW23. The one on the bottom in…Continue
allwave 12 audio interstage transformer.
Started this discussion. Last reply by Kent King Aug 15. 4 Replies 0 Likes
I need the audio interstage transformer mounted on the receiver chassis. The transformer is connected between the second detector tube and the two 1st audio tubes. I think it is a one to one…Continue
need control
Started this discussion. Last reply by Kent King Jul 16. 3 Replies 0 Likes
I need the sensitivity control for a phantom. Anyone have one?Continue
AC-10 Speaker
Started this discussion. Last reply by Robert Meader Jul 11. 4 Replies 0 Likes
I just purchased a bunch complete scott's with cabinets. Included in the mix is a radio which is to me the most valuable piece a Scott AC-10 with power supply/amplifier. What's missing is the…Continue
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"If this tuner is like the FM tuner section of the philharmonic and phantom receivers it will have a drift problem. The cure is to place the 10pf capacitor connected to the oscillator coil with a 10pf N750 capacitor."
"I have a shield grid 9 but no power supply. I am very interested in the power supply.
In a related item my shield grid 9 has a mixer coil plugged into the oscillator position.
I am planning to modify the mixer coil into a oscillator coil but I…"
"I have plenty of spare AW23 parts chassis...let me get a few pics and I am sure I can provide everything you'll need.
Kent"
"I will using the coil platter from the spare aw23 chassis so I will need a replacement. This spare aw23 chassis has excellent chrome but if you closely a the picture it has been converted to 7 pin tubes! I will need a complete set of…"
"I looked tonight, I don't have a parts AW12-2 chassis (thought I did, but didn't see it)...so I can't help on this. Sorry
Kent"
"I have not found differences in the AW23 coil platters. There ARE differences in the AW15 sets, they are not easily interchangeable. I have <several> extra AW23 coil platters if you need one.
Kent"
"Sorry - yes, I usually refer to the Allwave Two-dial as the AW12-2. Let me check, I may have one on another chassis around here. I will try to look tomorrow.
Kent"
"interstage.jpg See picture. This scott has two dials and plug-in coils to select bands,12 tubes so it is an aw12 but the schematic says "All Wave" super receiver chassis. Anyway I need that transformer. The…"
"On the AW12 sets, there is no transformer on the tuner chassis. There is an audio choke mounted under the chrome can on the tuner. Those chokes often go bad and the audio response is poor (no bass) when they are open. The AW15 sets do have a…"
"Very likely I will have one...which specific version of the Phantom do you have?
Kent"
need control
I need the sensitivity control for a phantom. Anyone have one?See More
"I lucked out someone had a Roland d-90 speaker on ebay. I just got the speaker field wires are cut so I will need to check it to see if has the correct field coil resistance. The output transformer it is a simple step down type."
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Comment Wall (1 comment)
- At 1:33pm on July 5, 2023,
Michael J Boessen said…
Hi, Robert:
I've never done a "comment" before. Don't even know how! Thanks for your thoughts. that is really thinking outside the box!
I already have a 6.5v supply feeding into the chassis to supply the David Winter FM module I have substituted in for the blue band. I think it is running about 5.5v with a couple of series diodes I put in there to drop the voltage.. I could likely stick in something like a 6CB6, which are good to about 40mhz and pull out one of the diodes to get the filament voltage right. I'd have to jump some screen voltage over to it, but it might be a fun experiment. I'm trying to add some windings to the oscillator coil to make it reach the low end better, but I suspect trouble on the high end after I am finished. Hmm. I'd have to make a tube adapter....No idea if that 6CB6 will oscillate in that circuit. It's really an amplifier. Man, you really have me thinking.....
Thanks for the thought!
Best
Mike
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