Thick Film Hybrid (not monolithic) Integrated Circuit Amplifier - Overview

[PMA]

WSH111, fast thick-film hybrid amplifier. Tesla (CZ), about 1980. There was a whole production line of thick-film hybrid amplifiers.

 

[SVI2004A]

Some Technics SVI chips...

Note how the BC module lost new class A circuitry (Synchro Bias circuitry between power transistors)

 

[amplifiers inc]

Heres an oldie - Harris Corp's HC2500 metal case 100 Watt Power OP AMP .....

This thing went out of production circa 1985 thus giving me the job of designing some sort of substitute circuit / work around for the company's theater sound reinforcement amplification product. I would describe this an "aerospace grade" power amplifier module. The Harris data sheet actually describes it as "hermetically" sealed. Interestingly enough I ended up using the STK series of hybrid power output stages made by Sanyo ~ STK-0100 with a discrete driver input / stage as a replacement....

Datasheet Archive HC2000H datasheet download

 

[tiefbassuebertr]

Simply STK-Replacement by a Push-Pull Class AB-Darlington Power Amp or Buffer ?

First happy new year to all.
If I have an easy discrete universal power amplifier or power buffer circuit with stable idle current, each STK and other exotic hybrid thickfilm version would be easy to replace.
Below some links and images of various power amplifier circuits.
Which circuit should I prefer ?

Welcome to the DIY country ! - 15W darlington power amplifier
http://www.solaris.no/electronics/power_amp/bipolar/elektor90w/elektor90W_800.gif
Easy 100 Watt Power Amplifier - Amplifier Circuit Design
Electronic devices: POWER AMPLIFIERS [part 1] (Fig 19A/Fig 20A)
Class AB amplifier circuit not working correctly - Page 1
https://consort3.wordpress.com/2010/10/30/simple-cost-effective-darlington-amplifier/
high power output stage buffer driver for audio amplifier

Building a STK013 / STK014 replacement
https://audiokarma.org/forums/index.php?threads/stk-0050-replacement-for-sx-780-and-others.721181/

 

[tiefbassuebertr]

Looking for a small driver board for darlington pair BDT64B/BDT65B (for repair a OM961 from Philips/NXP).
Are there suppliers therefore ?
I want to make repair service at Canton Plus A/Plus B - go for images to
http://www.hifi-forum.de/viewthread-225-4602.html
and
http://www.audiofilek.pl/pl/baza-pl...odukt/5-kolumny-glosnikowe/2111-canton-plus-b

 

[chinoy]

First thanks to OP. What a wealth of info you have shared with us.
I was researching the Philips OM961
You may want to chk out this link.
https://ia600804.us.archive.org/20/items/ElektorMagazine/Elektor[nonlinear.ir] 1979-11.pdf

 

[tiefbassuebertr]

check out this URLs:
https://web.archive.org/web/20050317100439/http://www.homestead.com/whaan/files/om931.html
https://shop.psf-technik.de/office/...-ersatz-fuer-hifi-componenten-und-verstaerker
https://www.ebay.de/itm/114429818285
https://www.ebay-kleinanzeigen.de/s...rsi-le-30-auf-kuehlkoerper/2205787916-74-1976
https://www.elektroda.pl/rtvforum/topic3749679.html
https://www.circuitsonline.net/forum/view/146717