"I was going to ask if any shielded cable was grounded on both ends. That will cause a ground loop hum. I never would have thought of the dial lamp introducing hum via a coil cover. That's a very helpful hint to store up for…"
The Fine Things are Always Hand Made
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Kent King
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Kent King's Discussions
AW 23 hum problem
Started this discussion. Last reply by Alex R. Whitaker yesterday. 2 Replies 1 Like
Before you say "it's a filter cap", please read through the work so far:I acquired an AW23 early tuner only and restored it. However, it has an awful 60-cycle hum. Now, I have 4 operating AW23 sets…Continue
New Materials in the Scott Info Archive
Started Nov 24 0 Replies 3 Likes
I'm working on an article about the Scott WWII radios and this has prompted me to do a lot of research. I also put out a call for manuals and fellow site member Tony Peterson sent me a manual…Continue
Seeking Military Set manuals
Started this discussion. Last reply by Kent King Dec 4. 12 Replies 1 Like
If any of you have the following military set manuals, I would love to get clean copies:RBO-3RDOSLR-12 (any version)Thanks!Continue
AW23 tuner hum
Started this discussion. Last reply by Thomas Day Aug 29. 9 Replies 0 Likes
Ok folks, I need some ideas. I have an AW23 tuner that has significant hum. And it is the tuner: running this tuner on a different amp/speaker, there is hum. Running a known good tuner on this…Continue
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"Test SW at night, and use as long a wire as you can for the antenna. It should pick up AM stations on the first SW band at the low end (it starts about 1.5MHz), there should also be stuff in the 6-10MHz range. Tune SLOWLY, the small SW unit in the…"
"I've been communicating with Norman most of today and he graciously led me to the source of the problem. The outer housing of the dial lamp was just touching the SW coil cover, introducing AC onto the entire tuner chassis. So watch out for that…"
"The B+ is a little high (should be 225-230VDC), but today's higher line voltages probably increase it some. If there is a Hi/Lo switch on the PS, be sure to set it for High voltages. Check to be sure the B+ divider resistor is good all the way…"
"I can probably help with a 55 or even a Wunderlich (I need to check what I have)...
Please don't throw out that turntable - the early ones are hard to find - I would be very interested in it, even if not working.
Kent"
AW 23 hum problem
Before you say "it's a filter cap", please read through the work so far:I acquired an AW23 early tuner only and restored it. However, it has an awful 60-cycle hum. Now, I have 4 operating AW23 sets here, so I tried this tuner with a couple other amps, they all hum. Using the same amp/spkr pairs with a late tuner chassis - they work perfectly. Last week, I got another (rougher) early tuner chassis. In spite of the condition, I restored it - and it also hums with any of the amp/spkr combos I have…See More
"I never got all of Gerry's MS materials. We did an exchange of data once back in 2006, I have everything from then, but that's a long time ago. And nothing in there on the MPIV you need.
Sadly, I haven't talked to him in quite some…"
"I looked through my MS folder (not very extensive), I only have schematics for the earlier version using the 42 outputs. Hopefully, someone here might have more. Did you post anything on the Antique Radio Forum?
Kent"
"Alex - thanks, both new. BB-330 was built Apr 20, 1940, so BB-331 is right there on a date."
"Philharmonic%20FM%20serial%20number.jpgPhilharmonic%20red%20dial%20serial%20number.jpg
I just bought two Philharmonic parts chassis (tuners only). One is an FM, and the other is a red dial deluxe. Serial numbers are in the attached…"
"A quick update to this thread...the only manual I appear to be missing now is the RBO-3, and I'm not sure if they ever made one for it specifically, or just did an addendum to the RBO-2 manual (I have some indication this might be the case). So…"
IMG_3836
"Love that you have this! Original boxes are very rare obviously. I have a few, but not an AW23 PS box...
Kent"
"Tony - the video is out on YouTube...it was too long for a single run, so whoever uploaded it did a Part I and a Part 2. The EHSHS sold those VHS tapes back in the 90s. I have 2 or 3 here that were never sold. I still keep a VCR player around too,…"
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Two Philharmonic sets for sale
Posted on November 29, 2024 at 8:24pm 3 Comments 0 Likes
Hey all...I have two Philharmonic sets taking up space and I won't be finding time to do anything with them...so I am putting them out here. The first is a red band deluxe (1939). This set has caps replaced and does play but needs additional work. The second is a 1937 pointer dial set with the "Chicago" dial. This set is unrestored but complete. Both sets include a tuner, amp and a 15 in speaker.…
ContinuePhilharmonic IF wiring - schematic errors
Posted on November 11, 2024 at 10:50am 7 Comments 0 Likes
I'm working on a 1939 Beam of Light Philharmonic Deluxe and noticed a wiring error (ok, maybe)...in looking at the schematics available, it gets worse. Refer to the 3 images attached as needed. Here we go:
In the 1937 schematic, and in most sets I've worked on, pin 8 (cathode) and pin 5 (grid #3, usually tied to the cathode) go directly to ground. Pin 5 (at ground) is used as a tie point for the "pass through" caps in the IF cans. In the 1939 schematic, it looks like Scott added a…
ContinueAWA Shares on E. H. Scott Centennial
Posted on October 11, 2024 at 5:16pm 4 Comments 0 Likes
Next Wed evening (10/16), I will be presenting on E. H. Scott and his radios on the AWA Shares monthly Zoom meeting:
https://www.antiquewireless.org/homepage/awa-shares/
You do not have to be a member of AWA to attend, but you do need to register prior to the talk. I hope some of you are able to join me - I've got some neat pictures and info to share.
Kent
Updates to the Info Archive
Posted on October 8, 2024 at 10:14am 0 Comments 3 Likes
This is the beginning of a running blog on updates to the files saved in the Info Archive. This morning, I updated the file "Milsets.pdf" in the WWII Sets folder. Fellow member Angelo found some new US Govt documentation on the WWII sets and I have updated the file with a few new bits of info. More to come soon.
Comment Wall (21 comments)
- At 10:58am on October 30, 2023,
Thomas Day said…
Hi Kent:
I can send the money for the power supply Wednesday. Let me know how and where to send it. iI have used paypal in the past.
Thanks Thom. 6448 S Fairfield Ave. Chicago, Il 60629. 7737324913
- At 11:08am on April 27, 2022,
Bill Whelan said…
Hi Mr. King- I trust you have seen many of the customer cabinets that EH Scott customers commissioned in the 1930. I a trying to identify if this cabinet originally has EH Scott electronics installed in it. If not, any ideas?
Thanks you, Bill Whelan
- At 6:28pm on July 16, 2021,
norman david warren said…
got the trimmer ok Thanks Norman W.
- At 12:52am on July 29, 2018,
Ralph Kearton said…
Hi Kent
I'm Keen to get a copy or the collectors guide
However I would need it shipped to NZ
The eBay listing doesn't ship herec
Got any ideas as to. How I can get one
I've just signed up to pay pal if that helps
Cheers Ralph kearton
- At 5:57pm on January 28, 2017,
Kent King said…
that image is great! I will add it to the archive. Thank you!
- At 2:50pm on January 28, 2017,
Joseph W Strickland said…
Kent;
I hope this attachment works. I finished the composite figures 26 and 30 for the Late version 800B. I found this helpful in tracing out the electric tuning arrangement of the 800B receivers.
Joe
If this turns out to not be satisfactory resolution and detail, let me know and I will try sending the *.pdf file which is 5.3MB.
Joe
- At 1:58pm on January 14, 2017,
Kent;
I took a closer look at the Late 800B parts radio tuner chassis that I have. It is SN 6182 and I found its final test stamp inside the preset tuning assembly backplate and the date is Jan 15, 1947. So that one can be added to your database.
I took the time to take a good photo of the Late version 800B AM SW RF compartment underneath. This unit has never had any parts replaced in that area, so this part of it is unmolested. I had just noticed that the Early version SN 1035 that I have had already been worked on and there were some changes to bypass capacitor placement that I do not agree with. My intent is to put it back as close to original lead dress and parts placement as possible. Sometimes changes in part placement and lead dress can cause significant problems to develop and result in inability to properly align RF circuits.
Joe
- At 7:34am on November 23, 2016,
Thanks you! I have added your cleaned up diagrams to the Scott Info Archive 800B folder. Your work is greatly appreciated!
Kent
- At 4:50pm on November 21, 2016,
Kent;
Yes I am willing to contribute these for fellow members and others use. I enjoy doing this type of work. I was originally in product documentation at Collins Radio which included doing schematics.
Joe
- At 8:00am on November 21, 2016,
Joe -
That's great...when you get them done, I will post them in the archive if you are willing. All such work helps everyone here. That is what this forum is all about!
Kent
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