"Given your research, I went back and looked at mine again. My set speaker terminals are carefully ground off to remove the impedance.There is an 8 ohm matching resistor on the input (grid side) of the transformer:
and like yours, my output says 600…"
The Fine Things are Always Hand Made
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"Okay, the only thing I am finding that relates to a line impedance is the label on the speaker output terminal strip. It is marked 600-ohm speaker. However, measuring DC resistance across the terminals yields approximately 3-ohms. …"
"Those audio transformers appear to be swapped! The SLRM has a 500-ohm output which would match up with the 500-ohm winding of what you show as the output transformer. I'll investigate my Export receiver with amp and original speaker…"
"I think that I may have just found a purpose for my 510 amp. If I added a octal style plug to the SLR-H I could do away with the little accessory trans (pic upper left). That way I can still use it as a test fixture, it's current job. And …"
"Yes, this unit just connects to the speaker output from the set, driven by the 25L6s."
"So, with the outboard amp, the radio still have/run the pair of 25L6s? "
Scott Export Set and "amp"
Although it was built after the war, the Export set is a relatively scarce set. At the end of WW2, Scott was "stuck" with a large number of partially completed SLRM sets. They put a better face on them and the Export was born. They removed the BFO, but otherwise, the Export is an SLRM. The SLRM is an AC/DC (transformerless) set with AM and SW coverage. I have only ever seen 4 or 5 of these sets, however, there is an odd little thing going on. In the pics here, I provided the front and top view…See More
"Thanks for the explanation. I had not thought about how the noise floor would desensitize FM reception.
Norman"
"42 MHz was FM. But, the noise floor is there, nevertheless.....causing receiver desense. That was the reason that our radios all had noise blankers....not just for noise inside the vehicle, but from outside as well. I do see…"
"Interesting. I thought civil service radio communications in the 42-mhz band were FM. There was no shortage of noise sources in the early days of radio broadcasting and the noise sources were robust and widespread. Aside from…"
"However, there were a lot less machines around that generated electrical noise then than the millions of noise makers that are around today. I don't know.....if there had been equipment around back then to measure the noise floor,…"
"The noise floor was very high in the early days of broadcasting due to lack of noise suppression on all kinds of machinery including automobiles. The feat would be difficult to reproduce today due to crowded bands.
Norman"
"When I think about the noise floor, today, I think that Scott's reception feat from 100 years ago would not be able to be duplicated. Add in the fact that almost all those stations, like Dave P. said, are considered low power today, makes…"
Photos
Forum
The Centennial Begins!
Started by Kent King. Last reply by Norman S Braithwaite Jan 14. 11 Replies 4 Likes
100 years ago today (Dec 27, 1924), E. H. Scott used his World's Record Super in Tasman New Zealand and heard station WOC, Davenport, Iowa, a distance of almost 8000 miles. For the next 3 months,…Continue
McMurdo Silver Masterpiece VI
Started by Jiri Placek. Last reply by Jiri Placek Jan 3. 9 Replies 0 Likes
I am scaling down due to moving and I am considering keeping only MP4 and MP5 while letting go an unmolested MP6 with a good 18" speaker in Oxford cabinet. Here is my dilemma - I have seen too many…Continue
Scott 800 PM vs electromagnetic speakers
Started by Daniel Kingloff. Last reply by Alex R. Whitaker Dec 30, 2024. 16 Replies 0 Likes
I have an 800 chassis that I bought some years ago without a speaker or cabinet. I'd like to get it working again but have some confusions about the speakers. I understand that some were PM and…Continue
AW 23 hum problem
Started by Kent King. Last reply by Alex R. Whitaker Dec 18, 2024. 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
Blog Posts
Scott Export Set and "amp"
Posted by Kent King on January 18, 2025 at 8:30am 6 Comments 0 Likes
Although it was built after the war, the Export set is a relatively scarce set. At the end of WW2, Scott was "stuck" with a large number of partially completed SLRM sets. They put a better face on them and the Export was born. They removed the BFO, but otherwise, the Export is an SLRM. The SLRM is an AC/DC (transformerless) set with AM and SW coverage. I have only ever seen 4 or 5 of these sets, however, there is an odd little thing going on. In the pics here, I provided the front and top…
ContinueAssembly video AW-15
Posted by Tony Ellis on December 1, 2024 at 2:52pm 1 Comment 0 Likes
I purchased a VHS tape years ago that showed the assembly of an AW-15 filmed in the Scott factory. Nice shots inside the factory. if this isn't already available on the website i can try to get it digitized and share it
Two Philharmonic sets for sale
Posted by Kent King 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 by Kent King 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…
ContinueEvents
Notes
Welcome to our Site!
Welcome to The E.H. Scott Enthusiasts Site. If you are looking for manuals or service data on a Scott set, please click on the "Scott Info Archive" link above. If you have questions for forum members, a picture is worth 1000 words, please post a pic or two to help describe your question or problem. Finally, this forum works best when we all contribute. Answer questions, provide feedback, and if you have a document worth sharing, please scan it in as a PDF and forward it to me: Kent King,…
ContinueCreated by Kent King Feb 22, 2016 at 8:06am. Last updated by Kent King Jul 9, 2024.
SCOTT PARTS
If you are seeking any odd chassis parts, please email me with your needs (kent3256[at]hotmail.com). I have over 40 chassis representing all Scott models from 1932 to 1947, so if you need an odd item, I might have it. What I do NOT have are knobs, escutcheons, bottom plates, dial pointers and tuning meters from the 12-15-23 sets. Sadly, those are all in very short supply. I do occasionally get these very rare parts, so always ask - you never know what I might have available for your…
ContinueCreated by Kent King Jul 9, 2024 at 7:22pm. Last updated by Kent King Jul 9, 2024.
Collector's Guide
The Collector's Guide is available...if you don't have a copy, it is a great reference to everything Scott. Proceeds benefit the maintenance of this site. Email me at kent3256@hotmail.com for more information! I also have reprints of the 1940 Scott catalog available at a reduced price. Contact me kent3256(at)hotmail.com for more info! …
Created by Kent King Apr 3, 2020 at 7:08am. Last updated by Kent King Jul 9, 2024.
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