EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

mike hadley
  • Hitchin
  • United Kingdom
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mike hadley's Discussions

30 into 23 will go

Started this discussion. Last reply by Thomas Day Sep 24, 2019. 3 Replies

I thought that I would like to share the last installment of my Philharmonic,the cabinet started life as an Allwave 23 Tasman, but the radio has sadly long gone, and there was some horrible…Continue

Mcmurdo silver masterpiece v

Started this discussion. Last reply by mike hadley Aug 9, 2019. 4 Replies

Can anyone please help,I have recently managed to get my hands on a masterpiece v, but unfortunately someone in the past has removed the bass boost inductors from the output of the expander circuit,…Continue

Scott logo

Started this discussion. Last reply by Jon Ketron Aug 7, 2019. 3 Replies

Can anyone please help,I need a fairly good photo of the Scott logo from the rear of a speaker, the idea is to reproduce the artwork and make it available on this site,thanks in advance.MikeContinue

philharmionic bezel spring

Started this discussion. Last reply by Thomas Day Jan 12. 17 Replies

The dial bezel on my philly had tarnished to a dull brown, and the glass locking spring had rusted in position, this proved quite difficult to remove, after working at the old spring with a pick I…Continue

 

mike hadley's Page

Latest Activity

mike hadley replied to Karl Sherwin's discussion Will a Welllington cabinet fit a FM Philharmonic?
"Karl, the philharmonic is a deep chassis, it will hang out of the cabinet a little, I used a Tasman cabinet that originally housed an allwave 23' the Philly stuck out about an inch or so, I made a removable frame to cover the chassis I also…"
Feb 9
mike hadley replied to Karl Sherwin's discussion Will a Welllington cabinet fit a FM Philharmonic?
"Scott, this has got to be one of the most boring photo's ever, it' an off cut from the plywood I used for my philharmonic  A shade under 9mm (sorry it's metric again) Mike"
Feb 9
mike hadley replied to Karl Sherwin's discussion Will a Welllington cabinet fit a FM Philharmonic?
"Sorry Scott I forgot myself, I used 'That' birch ply as it was the nearest size I could get, the 1/4 inch stuff over here is all coarse filler inbetween the surface veneer, I used 9mm birch with walnut veneer on one side, used hot hide…"
Feb 9
mike hadley replied to Karl Sherwin's discussion Will a Welllington cabinet fit a FM Philharmonic?
"Is 9mm birch ply available in the USA, That's what I used for my philharmonic readily available here in the UK."
Feb 8
mike hadley replied to Karl Sherwin's discussion FM Phantom set for sale
"Karl, when you post you will see the dialog box appear, click on the box circled in yellow, then browse your computer, select the photo you want, then click on ok Mike"
Feb 8
mike hadley replied to Karl Sherwin's discussion Will a Welllington cabinet fit a FM Philharmonic?
"Karl, For cutting plywood these blades are really good, the teeth are set inwards, there is almost no saw tear out and they cut curves a treat, I used them for cutting the front panel when I fitted my Philharmonic into a Tasman cabinet"
Feb 8
mike hadley replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Hi Troy, If there was a problem with the power transformer you would know about it by now, if there is a shorted turn it's usually followed by smoke, dont't forget that the 6L6 tubes are running in class A and will be pulling a fair bit of…"
Feb 8
mike hadley replied to Robert Feenstra's discussion Scott SLRM
"Thanks for the thank you, there are plenty more where that one came from. Mike"
Feb 5
mike hadley replied to Kent King's discussion AW23 osc issue
"I presume that you have swapped the tube to see if that helps, is the 50pf cap to the oscillator grid ok. I have had similar problems with a similar circuit in the past. Is the turret making contact with the coils, may seem a stupid question but you…"
Jan 29
mike hadley replied to Kent King's discussion Unusual amp chassis
"Maybe the line up could be from right to left, power transformer, a pair of 5z3's, then a couple of chokes followed by three smoothing caps, then 6 x  6l6 tubes in push pull, finally a 6sn7 phase splitter, that would be good for a 100watts…"
Jan 22
mike hadley replied to Steve Pierce's discussion Plug and Play FM tuner
"I use one of these, Bandwidth is excellent, a good companion for my Philharmonic, plus it uses the whole radio not just the phono input. Mike"
Jan 21
mike hadley replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Karl Look at the top of this page, Scott info and archive, see Philharmonic folder, lots of information there"
Jan 17
mike hadley replied to Troy Taylor's discussion Low voltage in Philharmonic power supply
"Troy, The 10H choke is in the supply to the 6L6 output tubes, the 30H choke runs the radio through the field coil, are your 6L6 tubes ok, have you checked the values of the biasing resistors for the tubes? check the audio output transformer for…"
Jan 17
Thomas Day replied to mike hadley's discussion philharmionic bezel spring
"Knowing your past experience with electro-forming, I would expect nothing less than perfection. Seriously, this looks like a very interesting way to make replacements for parts that are not available any longer. Hope it all turns out. Thom"
Jan 12
mike hadley replied to mike hadley's discussion philharmionic bezel spring
"Nice job Scott, Thanks for the update, it's worth noting that there are two different sizes of spring,  120 thou for the larger size and 92 thou for the smaller, I have made a mold, to see if I can electroform one, here are a couple of…"
Jan 12
Scott Seickel replied to mike hadley's discussion philharmionic bezel spring
"Mike, I got some 0.092" strings today.  I was able to find then in an online store that sold single stings.  Slightly smaller than the originals that I measured, but they still fit good.  I got both of my escutcheons that needed…"
Jan 11

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At 6:29pm on February 28, 2020, mike hadley said…

Thom;

Thank heaven for Hammond, my Mcmurdo v had the tone stack hacked out, long before the set came into my possession, I ran the tone schematic through ltspice to get the inductor values, Mouser provided.

I now have accumulated parts to build the combined psu and amp, luckily I have enough bench supplies to prove the radio is working.

I quite often find that if you keep chipping away, rather than tearing into a project, it allows thinking time. This helps to find the best way around a problem.

And as you know I found a way around the seven pin socket problem for my Philly a while ago.

Mike

At 5:27pm on February 28, 2020, Thomas Day said…
Mike: Nice power supply. I can source a similar used Heathkit supply here on Ebay.
I worked for them from 1967 thru 1974. I left in 1975. Here, Hammond transformer company makes suitable transformers for tube equipment at reasonable prices. I also have several Hammond organ Leslie amplifiers that have a balanced input. Since I would also need 6.3 volts at 5 amps for the filaments, a complete transformer supply would be better. When I bought my Allwave 23, the one question I didn't ask was does it work? The answer as I found out was no. The power transformer had a shorted winding. Thru this list I was able to find a company in Michigan that could wind a new one. Took several months, and since we go the Muskegon Mi. in October, and the company is on the way, I was able to pick up the new one. Minor construction differences required a custom mount, but it works just fine. For my needs, I would only need the tuner B+ and -20 volts for the bias circuits. I would also need to source the 7 pin socket to match the tuner plug. Since it is different from the standard 7 pin, that could be hard to find. I enjoy your posts on restorations.
 
 
 

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