"Glad to hear it is working well now. I'm not surprised that the major components were OK, I sell a lot of parts off chassis, but seldom anything other than controls off the Philharmonic sets. Only notable exception was an antenna coil to…"
The Fine Things are Always Hand Made
Don Jackson's Discussions
My First Scott: An Allwave 23
Started this discussion. Last reply by Thomas Day Apr 8, 2024. 1 Reply 4 Likes
I found this Allwave 23 at a local auction, it seemed to be mostly there so I bid on it. It was missing the knobs, someone told me to contact Kent King for a reproduction bandswitch knob. Kent was…Continue
Allwave Superheterodyne Power Supply?
Started this discussion. Last reply by David C. Poland Apr 18, 2024. 1 Reply 0 Likes
Can anyone help me identify this unit? After searching the archive, it appears to be a model 145 power pack for a 2 dial Allwave 12. If this is correct, please let me know. Would this have been used…Continue
Scott Philharmonic Pointer Dial Front Panel
Started this discussion. Last reply by Russ Webb Oct 8, 2024. 14 Replies 0 Likes
Hi, I am a new member here and recently had the good fortune to acquire a 5 knob Allwave 23 with a Tasman cabinet and a Pointer Dial Philharmonic chassis, amplifier and speaker. The Allwave 23…Continue
Don Jackson's Page
Latest Activity
"Quick update, Norman was correct in suggesting that someone had aligned the set with the selectivity / fidelity control in the full clockwise position rather than the maximum selectivity position at full counter clockwise. I aligned the set using…"
"Thank you Don. "
"Here is a copy of the 500K pots offered by IRC and a taper chart from the catalog. It appears they did offer some with 25 k and 50 K taps. Any of the tapped audio pots I recall seeing had taps at 100k or more, as you noted. I have a couple of newer…"
"Thanks Don. Looks like it is easier to do with one of these pots that were designed to accept taps. I couldn't find a catalog online. "
"Scott
The potentiometer is an IRC 13-133. It is listed in an IRC catalog which is available online if you don't have one. In the catalog is is noted as a "left handed logarithmic taper for audio circuit control" with a 3 (C) taper. It…"
"Scott
Thanks for clarifying the fidelity caps. I made a copy of the early schematic from the archives and made an enlarged copy and have made note of the values of the resistors and capacitors. There are some fuzzy symbols next to the caps on the…"
"David
Yes, good catch on the capacitors. One could easily assume they are mica capacitors. I checked the C divider and it is fine, but noticed another capacitor that appears to be the same species close to it. I am going to remove the diode…"
"Mike
Nice boxes! Both of mine are gone, the one for the electrolytics was replaced with an FP capacitor. I made a copy of the dimension and might try making some myself. As for the bass tone assembly, I will probably replace the caps and hope for…"
"Refering to your bass tone assembly I reworked mine to suit the 50hz mains supply over here in the UK,
there is a mention here
https://ehscott.ning.com/forum/topics/philly-bol-schematic?id=3925821%3ATopic%3A75847&page=2#comments
you can do…"
"good that you addressed the step tap caps because they are in a high voltage situation off a tube plate circuit.
And do pay attention that the -C voltage divider is ok.
Replacing the caps inside the 3 diode assemblies is a pain, but do it and check…"
""I am going to remove the bass tones assembly and see if the caps have been replaced. I have read other posts here that stress the importance of having pairs of caps as close to .02 and .025 as possible."
I went thru this 10 years…"
""I attached a photo of the fidelity control, apparently all 5 caps are .01 but 3 of them are mica. From what I have seen most people change them all. I am wondering why the 2 larger caps were used instead of mica. I believe these are paper,…"
"If you want to make your own cap boxes I made these a while back,
https://ehscott.ning.com/forum/topics/philly-cap-box?commentId=3925821%3AComment%3A77497
Mike"
"Your suspicions are correct, those caps are awful. They failed the leakage test on my Heathkit IT-28 at 10 volts! As for the volume control, there is another post here with a Youtube video showing how to add a tap using conductive silver epoxy. I…"
Don Jackson's Blog
Pointer Dial Philharmonic Selectivity Trimmers
Posted on February 22, 2025 at 7:00pm 26 Comments 0 Likes
Can someone verify the correct orientation of the selectivity trimmers in an early pointer dial Philharmonic? In my set the trimmer closest to the front of the set is meshed when the selectivity / fidelity control is fully counter clockwise. In this position, from front to back the trimmers are meshed, unmeshed, meshed and unmeshed. Is this correct?
The volume control has been replaced and I wounder if someone removed the fidelity control during the process and messed things up. The…
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