Never heard of TSL

jitter · 2nd November 2010, 08:04 AM

I own a Micromega DAC1 which I use to get decent sound quality from my AV-sources. The DAC1's power section consists of three separate transformers which feed a total of 16 voltage regulators. 12 of these are the familiar L7805CV. All components, except these 7805s, are of well-known brands (Philips, Wima, TI, Motorola, NSC, you name it).

The brand is TSL (never heard of) and they don't carry any date/lot code. With most of these the case looks chipped around the edges and the rear of tab seems to have been (hand-?)ground on a coarse grinding stone. Needless to say that I replaced them with STs I had lying around.

Since this DAC1 was made around 1995, the brand TSL may no longer exist. Does anyone know these?

Elvee · 2nd November 2010, 08:34 AM

It is Tesla, a surviving state company of the communist era.

jitter · 2nd November 2010, 05:14 PM

I must say, despite looking conspicuously like cheap copies (but who'd bother with counterfeiting the 78xx anyway?!?), all 12 measured within spec. with respect to voltage. The STs don't seem to have changed the sound perceptibly, so the replacement turns out to be mainly a peace-of-mind thing...

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2nd November 2010, 08:34 AM	#2
Elvee diyAudio Member Join Date: Sep 2006	It is Tesla, a surviving state company of the communist era.

2nd November 2010, 05:14 PM	#3
jitter diyAudio Member Join Date: Aug 2004 Location: Eindhoven, The Netherlands	I must say, despite looking conspicuously like cheap copies (but who'd bother with counterfeiting the 78xx anyway?!?), all 12 measured within spec. with respect to voltage. The STs don't seem to have changed the sound perceptibly, so the replacement turns out to be mainly a peace-of-mind thing...

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