Author Topic: The RIP Thread  (Read 47376 times)

Offline S Clark

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Re: The RIP Thread
« Reply #240 on: February 17, 2024, 05:13:10 PM »
I'm sad to report that one of the most respected audio techs, Bill Thalmann, passed away about a month ago.  This guy probably fixed and upgraded more Technic SP-10 II's and III's than anyone.   He was generous with his time on the phone, and had a mastery of classic old gear.  Two of my turntables bear his stamp.   Don't know anyone that knew more about direct drive turntables. 
Good techs are a rare breed and getting rarer.   
Speaker-GR Research LS9-XStatik-AltecFlamenco
Amp-Moscode,Dodd,Folsom
Pre-Dodd
Turntable-Vyger,Victor,TechnicSP10MK2
Phonopre-Hagermann,Jolida,GSlee   
Cable-AudioSensibility Wywires TWL
Cartridge-Dynavector,Sumiko
Tonearm-PioneerP3,Jelco
Rythmic sub

Offline mresseguie

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Re: The RIP Thread
« Reply #241 on: February 17, 2024, 05:17:30 PM »
The power transformer?  All transformers on this unit are Lundahl.

It doesn't look like a transformer to me. I see three transformers across the back. The object I'm asking about sits directly in front of the rear center transformer. It is almost purple with a white (or silver?) horizontal bar at top.
Daedalus Audio Apollos; Fritz Loudspeakers LS/5-R
SW1X NOS DAC III BAL/SPL; Holo Spring3 KTE
Don Sachs Model 2 preamp
Don Sachs dual mono 300b; Nuprime Evolution STA
Hapa loom
PI Audio UberBUSS, DigiBUSS, Uber-MiniBUS

Offline S Clark

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Re: The RIP Thread
« Reply #242 on: February 17, 2024, 07:58:04 PM »
OK.  Yep those are heat sinks.  Beats me what they are doing exactly. 
Here is an article on the build of this very same amp.  Maybe it sheds light...
https://www.dagogo.com/the-kk-audio-st70-boards-part-3-of-3/


« Last Edit: February 17, 2024, 08:04:04 PM by S Clark »
Speaker-GR Research LS9-XStatik-AltecFlamenco
Amp-Moscode,Dodd,Folsom
Pre-Dodd
Turntable-Vyger,Victor,TechnicSP10MK2
Phonopre-Hagermann,Jolida,GSlee   
Cable-AudioSensibility Wywires TWL
Cartridge-Dynavector,Sumiko
Tonearm-PioneerP3,Jelco
Rythmic sub

Online P.I.

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Re: The RIP Thread
« Reply #243 on: February 17, 2024, 09:21:00 PM »
OK.  Yep those are heat sinks.  Beats me what they are doing exactly. 
Here is an article on the build of this very same amp.  Maybe it sheds light...
https://www.dagogo.com/the-kk-audio-st70-boards-part-3-of-3/



They operate as chimneys.  What you can't see are the through holes in the circuit board underneath the heat sinks.   As things heat up, the differing thermal coefficients cause aluminum to heat quicker than the steel chassis.  Heat rises.  Heat differential convection will create a cooling flow through the chimney.

Thermodynamics.
« Last Edit: February 17, 2024, 09:36:34 PM by P.I. »
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