NorCal715

NorCal715 My YouTube companion page. When I get time! Contact me via email [email protected]

Picked up this sweet Kenwood KR-4070 stereo receiver for $50 a bit ago. After a little AM & FM RF/IF alignment and one m...
05/04/2024

Picked up this sweet Kenwood KR-4070 stereo receiver for $50 a bit ago. After a little AM & FM RF/IF alignment and one meter lamp replacement, it works perfectly for an almost 50 year old receiver. It's only 40w rms per channel but it sounds great. It still has the original problematic output transistors and the original dial indicator lamps so I believe it is a fairly low hour unit.

Sony professional TCM-5000EV mono 3-head tape recorder from the 80s up on the bench now. Hopefully up and running again ...
10/09/2023

Sony professional TCM-5000EV mono 3-head tape recorder from the 80s up on the bench now. Hopefully up and running again soon after complete belt replacement. Video(s) to follow

An update (finally) bench testing an AIMS 36volt 5000watt inverter with a (light) load for the next 12 hours or so.
09/27/2023

An update (finally) bench testing an AIMS 36volt 5000watt inverter with a (light) load for the next 12 hours or so.

02/28/2023

The Nakamichi BX-300 cassette deck came back AGAIN! I determined that it was indeed the loading motor commuitator to brush connection issue. Video should be up in a few days, when I have time to edit it. Thank you everyone for your patience.

A complete teardown of an Adcom GFA-555 to the test all of the capacitors, and the gain of all 16 output transistors. V...
11/18/2022

A complete teardown of an Adcom GFA-555 to the test all of the capacitors, and the gain of all 16 output transistors. Video to follow soon(ish)

05/23/2022

A Beautiful Marantz 2230 from the early 70's. Complete LED re-lamp. Coming up soon on my channel

05/12/2022

Another Definitive Technology Powerfield SuperCube III saved from the recycle bin!

03/11/2022

A Honda car stereo from a 1988-1991 CRX that needs some serious attention.

03/01/2022

Working on a Definitive Technology Powerfield Trinity subwoofer. It has had a complete recap and still needs 4 output FETs and FET driver ICs. Hopefully the customer approves the estimate.

02/17/2022

Coming up on Norcal715 a Miller and Kreisel MX80 subwoofer

01/19/2022

A Denon AVR-4310CL with a high DC offset causing shutdown.

01/15/2022

An Onkyo TX-NR636 that came in with a blown channel. I repaired that and then slipped during adjusting the idle current and had to rebuild the surround back channel, uuugggghhh. Video will be up in the next several days. Thanks for watching

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Chico, CA
95926–95929, 95973, 95976

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