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Old 28th November 2011, 10:47 PM   #1
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Unhappy 45 TSE Checkout Fail

Step 1:
B- 220v
Filament voltages R 2.47 L 2.47

Step 2: Add GZ34
Filament glows
10 seconds later major bright sparking in tube
No B+ at any time

Switched off. No obvious damage to board.

Will double check board and post photos tomorrow.

Bad tube? (I only had one GZ34)

All advice gratefully received.
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Old 29th November 2011, 11:07 PM   #2
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A shorting tube. Ordered another - tested and 1 yr guarantee.
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Old 30th November 2011, 01:05 PM   #3
jrobson is offline jrobson  South Africa
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Good luck with the replacement...
Are you hooking this up to your Sachikos?
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Old 30th November 2011, 01:42 PM   #4
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Cheapo speakers first of course, then yes this is intended to be my main amp.

I will attach it - still breadboarded to the Sachikos. The TSE will either:

1) Be better (or the same) in which case I have all the stuff sitting here ready to go for the casework.
2) Be not as good - in which case I will consider myself a few $ lighter and wiser.
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FLAC, Ethernet over Mains, SB3, GD Audio DAC 19. Tubelab SE with TJ Meshplate 45s. Fostex FE208ez in Kirishima Horns with Fountek NeoCD 2.0 Ribbon supertweeters (0.68uF & LPads).
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Old 1st December 2011, 08:10 AM   #5
jrobson is offline jrobson  South Africa
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Good luck I guess we are in the same boat
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Old 7th December 2011, 11:20 PM   #6
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Quote:
Originally Posted by jrobson View Post
Good luck I guess we are in the same boat
Is that the "shorted tube" boat or the "Sachikos" boat?
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FLAC, Ethernet over Mains, SB3, GD Audio DAC 19. Tubelab SE with TJ Meshplate 45s. Fostex FE208ez in Kirishima Horns with Fountek NeoCD 2.0 Ribbon supertweeters (0.68uF & LPads).
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Old 8th December 2011, 06:22 AM   #7
jrobson is offline jrobson  South Africa
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Sachiko, can't figure out what the hell is up with my board, bought some new CCS's last night.... so we'll see next week if that is it.
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Old 16th December 2011, 01:35 PM   #8
jrobson is offline jrobson  South Africa
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Hi Alan

Did you get your replacement tube?
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Old 17th December 2011, 09:04 AM   #9
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Yes, it's here.

However after reading the "sparking rectifier tubes" thread, I am going to insert two 100 ohm resistors into the power supply before my next attempt.
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FLAC, Ethernet over Mains, SB3, GD Audio DAC 19. Tubelab SE with TJ Meshplate 45s. Fostex FE208ez in Kirishima Horns with Fountek NeoCD 2.0 Ribbon supertweeters (0.68uF & LPads).
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Old 14th January 2012, 09:45 AM   #10
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New rectifier tube OK, checkout completed uneventfully. Music!

Amp still on breadboard, and now transferred to the big rig (Fostex BLHs). Sounding very good indeed. Some background hum - hopefully casework, motor-run cap, will reduce that significantly.

After 4 or 5 hours critical listening, this amp betters the Decware Zen, in my system, by some distance.

Photos and detailed listening notes to follow.
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FLAC, Ethernet over Mains, SB3, GD Audio DAC 19. Tubelab SE with TJ Meshplate 45s. Fostex FE208ez in Kirishima Horns with Fountek NeoCD 2.0 Ribbon supertweeters (0.68uF & LPads).

Last edited by Alan Hope; 14th January 2012 at 09:48 AM.
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