Ampex 440C 1" 8trk Capstan motor

That’s great. Not that there aren’t others capable of doing the work, but John and his wife are great people and JRF is my preferred provider for evaluations and service on heads and assemblies. He’s done some amazing work for me.

Did you recap the plugin cards in the electronics at all? Do you know about the tantalum cap that should be replaced to mitigate risk of dead short failure mode and damage to the record head?
 
Yes John was nice, he did a set of 1/2" 4trk for me as well way back. So I replaced all the caps throughout the unit cards, power supply, the one Tantalum that can kill the head coil switched to a quality electrolytic. Replaced all the non-polarized caps in the transport. Motor caps.
 
Echoplex said:
Does anyone make replacement record heads now? For 440's?
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I really don’t think so…Flux was the last one I know of making new heads but I believe Greg retired. So anything out there would have to be from any existing stock. I’d check with John French and also ATR Services. There are others I’m sure…
 
All the head cables wire leads were messy so I carefully bundled everything, I did some repainting of some of the black parts. The headlock stainless steel cover was scratched so I had a new one fabricated. One power transistor was bad in the one power supply on back that needed replaced along with the large power supply caps. The only place I need to check is the power booster box behind the transport, I don't recall if I replaced that one as it has a one in there.
 
That's the disturbing issue, once the heads are worn completely these machines cannot continue to operate.
 
On the JRF website so maybe there are options.

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  • 1" 16-, 8-, or 4-track
  • 1/2" 4-track (standard or low-speed duplication mastering)
  • 1/2" or 1/4" 2-track mastering
  • 1" 2-track mastering for Studer A80, A800, J37 or C37
  • 2" 8-track (+ 9th timecode track) for Studer A800, A827, A820 Otari MTR90
  • High-speed and in-cassette duplication
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For any machine
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When it's time to replace your multitrack or mastering heads, JRF lets you choose the exact heads you want, selecting from a variety of sources and suppliers.​
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Independent Manufacturers - We carry the complete lines from a variety of independent manufacturers of replacement heads. No matter the make, model or age of your recorder, JRF has replacement heads that will bring your multitrack recorder back up to new factory spec – if not better! Give us a call for a listing of most suppliers and available models . Chances are we either have it in stock or can get it in a day or two.​
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