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Showing posts with label output amplifier. Show all posts
Showing posts with label output amplifier. Show all posts
Wednesday, September 30, 2026

Beomaster 8000 Type 1903 - Arizona Restoration Project - A Couple More PCB Restoration Tasks

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After t he previous post I couldn't stop thinking about the Beomaster 8000 frequency response results.  The output was a little beyond ...
Monday, September 14, 2026

Beomaster 8000 Type 1903 - Arizona Restoration Project - Finalizing The Repairs

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This Beomaster 8000 project is almost ready to wrap up.  I left off with this Beomaster functionally working.  To continue that, I did some...
Sunday, January 31, 2021

A Pair of Beomaster 1900 Receivers for Restoration: Unit #1 Reassembly for Testing and a Power Problem

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 The next step before testing the Beomaster 1900 was to reinstall the four output transistors that mount on the rear heatsinks. I had remove...
Friday, May 8, 2020

Beomaster 4400 Type 2419: Checking the amplifier right and left channels

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Before I finish reassembling this Beomaster 4400 receiver I made a few amplifier measurements to make sure the left and right channels are c...
Wednesday, November 28, 2018

Canada Beomaster 8000: Checking out the reworked boards

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In the last post on the Canada Beomaster 8000 I left off having completed the restored display board.  With that last board completed I can...
Monday, November 5, 2018

Texas Beomaster 8000: Readjusting the output amplifier assemblies - Part 1

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I was expecting to perform a quick task of verifying the output amplifier board no-load and DC offset adjustments (that I made earlier) were...