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His Master's Noise: A Thoroughly Modern Tube Phono Preamp
His Master's Noise: A Thoroughly Modern Tube Phono Preamp
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Old 30th June 2020, 02:14 PM   #621
cogeniac is offline cogeniac  United States
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Join Date: Feb 2015
Location: Petaluma, CA
Tibi. I have four NOS Siemens D3a/7721 tubes I can send you. Not sure how to pay for them (PayPal? Venmo?) . Prices seem all over the place. $30-$100, but almost nobody has them in stock.

PM me with an offer if you are interested.
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Old 1st July 2020, 01:12 PM   #622
tvicol is offline tvicol  Europe
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Join Date: Jan 2005
Location: Bucharest
His Master's Noise: A Thoroughly Modern Tube Phono Preamp
Thank you for your offer !
I hope to get D3a from a friend, otherwise will start to mail people on diyaudio.
Is good to know that some of you still have these. Thanks !

Here is latest HMS power supply version that include a small correction on 160V and 260V. These have been reverse marked. Also a small correction on R27 (on PCB R7). The value that worked for me, and I see for others too, is 6k6. So. I marked this on PCB R7=6k6*

Regards,
Tibi
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Old Yesterday, 08:30 AM   #623
tvicol is offline tvicol  Europe
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His Master's Noise: A Thoroughly Modern Tube Phono Preamp
Got a pair of NOS Philips D3a. :-))
I just finished Salas folded simplistic and will compare against HMN.

Regards,
tibi
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Last edited by tvicol; Yesterday at 08:33 AM.
 

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