Studer A820MCH mkII-

Channel 22 pops when switching between Sync and Repro monitoring.

Swapped Channel 22's Repro/Sync Amplifier and NRS Control boards with two separate channels to narrow it down to the Repro/Sync Amp. Traced the problem to a faulty SD214 MOSFET switch on the Repro/Sync ...

JSP recapped all the Repro, Record and HF Driver Boards on the Studer A820MCH MKII

Finished two EApreqs.

AKG 451E -

No low end.

Studer A820MCH Mkii-

JSP recapped all NRS Control boards (240 bipolar caps).


EAPreq (2-chan rack version) construction.

JSP recapped another set of Altec 195 supplies.

-Elesewhere-

Universal Audio LA-3 reissue-

Gain reduction meter showing maximum attenuation, with no signal present. Compression function, working however.

T4b not working. Swapped it with a companion unit, and all was good. UA's customer ...

Recapped and tested a couple Altec 539a power supplies (for 195 mic).

EApreq prepwork.

Discovered one of our ATR 1/4" 2-track repro heads is cooked. There was goofiness with adjusting the azimuth and the sensitivity was low. Looking at the actual head, I could see at the top and bottom, the gap ...

Sony C37p-

Out of service since the last hammering from a drumstick crushed the grill, and tore the capsule membrane.

I forced out the grill a bit to free up some room and replaced the capsule (sony still sells them). Reskinning is about as expensive as the new one.
Sounds great!

Happy New Year!

Neumann U67 standmount cable-

The male end (connects to the PSU) was deformed, wouldn't allow a good connection. The threaded shell looked like it was stomped on by a cow. The molded part holding the pins was also worn down, not able to be held in place securely.

Replaced with ...

Orange County Stressor - Dynamic Range Processor (compressor/limiter/expander module)-

Peak lamp was full on, and meter pinned, in full reduction. Peak and Compression lamps eventually burned out.

Module was recapped in the '00s, I believe by Tim Isler when he was filling in for me during my ...

Studer A820MCH MkII -

Recap list for this beast. There's slight differences between this and the other versions, so I had to recheck things.

Broke in new pace desoldering guy.

Recapped an A820 power supply switching stabilizer, and fancy repro board...

-Elsewhere-

Various trouble-shooting ...