"Have you looked for available interstage transformers? Radio Daze has several, including resistance figures.
Might look at the Hammond site too. "
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Felix-A. Gravel's Discussions
McMurdo-Silver Masterpiece VI T10 Interstage Transformer Missing
Started this discussion. Last reply by David C. Poland Dec 15. 5 Replies 0 Likes
Hi! My McMurdo-Silver Masterpiece 6 is currently being professionally restored and the project is going well except for one pretty big road block. The T10 interstage transformer in my unit is…Continue
7-knob Allwave 23 | Muffled Sound
Started this discussion. Last reply by Felix-A. Gravel Apr 29, 2024. 3 Replies 0 Likes
Hi,A gentleman from the Chicago area has reached out to me through Facebook because he is having issues with his Allwave 23. He bought it a couple years ago from a collector who had recapped it and…Continue
McMurdo-Silver MP6 Custom T10 Audio Interstage Transformer
Started this discussion. Last reply by Felix-A. Gravel Sep 29, 2023. 6 Replies 0 Likes
Hi there folks,About 1.5 year ago I took a little break in restoring my McMurdo-Silver Masterpiece VI because it is missing its T10 audio interstage transformer. Thanks to members of this forum, I…Continue
E.H. Scott FM Philarmonic parts needed - Tuning shaft & 15'' paper cone
Started this discussion. Last reply by Felix-A. Gravel Oct 10, 2022. 3 Replies 1 Like
Hi there, E.H. Scott peeps! My collection is growing, and last May I had the opportunity to purchase an FM Philarmonic from Mr. King. I bought this as a project for much, much later. See, my vision…Continue
Felix-A. Gravel's Page
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"I would think that, with the resistance values of each winding, you could extrapolate the turns ratio. You would have to take apart the transformer I sent you, and measure the wire gauge of each winding. Then, look at the ohms/foot…"
"I agree with your technician, you can't extrapolate from the DC Resistance values. Those secondary windings...even the direction they are wound may be relevant. I looked at my transformer catalogs of the period - I don't see anything that…"
"Since these original transformers are rare, I would recommend going to the Lundahl Transformer website. They have many varied interstage transformers to meet your circuit needs. I have used them in my Philharmonic which had a blown interstage too…"
"Looking at the entire July 1937 diagram, suggests the T10 transformer used was an "off the shelf" push-pull for both primary and secondary winding, but the primary side is wired together as a bigger single primary. I just wonder why…"
McMurdo-Silver Masterpiece VI T10 Interstage Transformer Missing
Hi! My McMurdo-Silver Masterpiece 6 is currently being professionally restored and the project is going well except for one pretty big road block. The T10 interstage transformer in my unit is missing, and it is quite unique in design. Yes, we have found a few transformers that will *work*, however there is always a big compromise in performance. On top of that, this radio being a very high-end model with a complete known pedigree from the day it left the factory (I am its 2nd owner!), I…See More
"Is there anyone near Sugar Grove, Il. willing to give this set a proper alignment? I could put the owner in touch with whomever volunteers."
"So the set might have been recapped, but if you don't follow the Scott alignment instructions, you will create problems like this. The Scott instructions are explicit for setting the selectivity control during alignment, and you have to pay…"
"First, this radio has adjustable band width. in the narrow setting, only low frequency audio comes through.
The variable fidelity control is labeled SELECTIVITY, the far right control.
Owner should start reading at page 8 of the…"
7-knob Allwave 23 | Muffled Sound
Hi,A gentleman from the Chicago area has reached out to me through Facebook because he is having issues with his Allwave 23. He bought it a couple years ago from a collector who had recapped it and it should theoretically be in good operating condition. It has two tweeters with the Westminster cabinet. The problem is that he can't get it to sound ''right''. He says the sound is muffled with too much bass, can't get any treble out of it (All About That Bass...).I first asked what kind of antenna…See More
"Said transformer is missing."
"could you just send the original transformer to get rewound? That way he should have all information he needs to create a new core?"
"Looking at your diagram on the top winding connect the joint of the bottom 100k resistor and transformer winding to the feedback network. On the bottom winding connect the joint of the top 100k resistor and transformer winding to the…"
"Felix,
I have two MPVIs......I just saw that the interstage transformer is on the amp chassis. I'll get to one of the amp chassis that I have, and get you the physical dimensions of the transformer. I don't know how hard the…"
"Good morning, Bob!
Just to make sure, is that what you had in mind? Might be a good avenue if you think it's going to function just as well as the original.
What value capacitor would you use?"
"Actually you can buy a new replacement of the shelf. As to which one depends on how the secondary winding is connected. If the two secondaries connect to a common point ie ground or negative supply then a standard one winding primary and…"
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