EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

mike hadley
  • hitchin
  • United Kingdom
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  • Jon Ketron
  • Joseph W Strickland
  • David C. Poland
  • Kent King

mike hadley's Discussions

dogbone resistors part 2

Started this discussion. Last reply by Jon Ketron Jul 2. 1 Reply

I was just going through some old photographs of the restoration of my allwave fifteen, I decided to update the post I placed a while back about dogbone resistors,so here is the process, I don't…Continue

Old tube boxes

Started this discussion. Last reply by Joseph W Strickland May 26. 11 Replies

Hi,Can anyone supply me with some scans of old tube boxes, I would like to reproduce the artwork and make boxes for storing spare tubes in, they would look better than plain white ones as supplied…Continue

allwave fifteen amplifier schematic

Started this discussion. Last reply by David C. Poland May 4. 7 Replies

I have been redrawing the allwave fifteen amplifier to include the jack socket part No.15 in the parts list.as my aw15 does not have the hi-lo switch part No. 17, can anyone please tell me where this…Continue

multi section capacitors

Started this discussion. Last reply by Joseph W Strickland Apr 28. 3 Replies

After posting my method for stuffing screw mount caps, I thought I would post how I first started with multi section caps.as in a previous post, use either the original cap or a suitable donor…Continue

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Latest Activity

mike hadley replied to David C. Poland's discussion Repo large tuning knob for Scott Philharmonic and model Sixteen.
"The mould is coated with graphite and the surface worked with a soft brush until it takes on a metallic lustre, this becomes the cathode, the mould is then submerged in a copper sulfate solution with a copper anode and plated, a very thick layer can…"
Aug 5
mike hadley replied to David C. Poland's discussion Repo large tuning knob for Scott Philharmonic and model Sixteen.
"Take a silicone mould from a scott escutcheon and make this conductive by rubbing the surface with powdered graphite, this can then be electroplated with copper, I used to do this as a kid with candle wax and coins etc works reallly well. Mike"
Aug 5
mike hadley replied to David C. Poland's discussion Repo large tuning knob for Scott Philharmonic and model Sixteen.
"Nice work, have you ever thought of making escutcheons by electro forming?"
Aug 5
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Joe; I forgot to include a scope across the cap under test to measure ripple, half wave rectification is used as it gives far more ripple than full wave, this gives a better idea of the internal condition of the cap Mike"
Jul 10
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Jon; I have attached the method we use for cap testing, it allows for the slow application of dc and the whole thing is current limited by the lamps, there is also the facility to over volt the cap, this is a particular nasty thing to do to the cap…"
Jul 10
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Jon, I only performed the test because the caps could be removed from the chassis and I has access to the test equipment, otherwise I would have restuffed. I'm still thinking about replacing the caps as I can easily find some cans to fit and…"
Jul 9
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Jon; Thanks for the compliment, as you can see I have a little more rust than you do, the damp storage caused the psu transformer to develop a fault, so unfortunately that's not original but under the shroud who would know. Both of the 3uf caps…"
Jul 8
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Jon; I have attached a before and after photo of the underside of my chassis, only four caps are unstuffed, the two 3uf bolt electrolytics, surprisingly these are still ok after all of these years, and the two bathtubs that are located under the…"
Jul 8
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Jon; Nice vid, what's the tune you're playing? I take it that the signal was coming through your own in house transmitter, you seem to have a little hum between tracks. I have a modified talking house, was a real pain to sort out, the…"
Jul 5
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Dave; It would be interesting to know just how many variants of the aw15 were actually made, it seems that no two sets were alike, Like johns chassis mine has no rear tone control, it does have the dual pot on the volume control, the static control…"
Jul 4
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Jon, For what it's worth my aw15 also has the same static control, looking at the circuit it is little more than a top cut, variable resistor and a cap to cut hf. My fifteen is a four post type with wunderlich detector, I have attached a photo…"
Jul 4
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Jon; the scott was my first adventure into an American set, the radio's here in the uk seem really basic, because of the tube tax (anything up to 67%) and the British Valve Association imposing a levy on tube sockets we ended up with a four…"
Jul 2
mike hadley replied to Jon Ketron's discussion 1934 AW 15 Electrical Restoration, Questions Please
"Jon; Looks like the big day is getting closer, you say this set belongs to a friend, I think that if it performs anything like my aw15 you will have a real problem giving it back, Good luck with the final parts of the restoration, we a are all…"
Jul 2
Jon Ketron replied to mike hadley's discussion dogbone resistors part 2
"Excellent write up Mike.  Thank you for sharing a detailed explanation of this process.  I am going to try this very exact method.  Your reproductions look to be very accurate. Jon"
Jul 2
mike hadley posted a discussion

dogbone resistors

I was just going through some old photographs of the restoration of my allwave fifteen, I decided to update the post I placed a while back about dogbone resistors,so here is the process, I don't claim to have invented this as it's already on the net, the process works surprisingly well.you will need some metal filled epoxy putty, an old resistor to copy (thanks Kent) and a mould release agent, I used homemade beeswax paste polish.first mix a chunk of epoxy putty, then rub wax into the "donor"…See More
Jul 2
mike hadley replied to Joseph W Strickland's discussion 800B Chassis Install in 16A Cabinet
"Joe: if you want any more cap cans there are plenty more available, the ones you have originated from a lift motor drive, that particular customer insists that all capacitors are changed at time of repair, including bus caps, it saves their company…"
Jun 24

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