45 TSE Checkout Fail

Alan Hope · 28th November 2011, 10:47 PM

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.

Alan Hope · 29th November 2011, 11:07 PM

A shorting tube. Ordered another - tested and 1 yr guarantee.

jrobson · 30th November 2011, 01:05 PM

Good luck with the replacement...
Are you hooking this up to your Sachikos?

Alan Hope · 30th November 2011, 01:42 PM

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.

jrobson · 1st December 2011, 08:10 AM

Good luck I guess we are in the same boat

Alan Hope · 7th December 2011, 11:20 PM

Quote:

Originally Posted by jrobson

Good luck I guess we are in the same boat

Is that the "shorted tube" boat or the "Sachikos" boat?

jrobson · 8th December 2011, 06:22 AM

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.

jrobson · 16th December 2011, 01:35 PM

Hi Alan

Did you get your replacement tube?

Alan Hope · 17th December 2011, 09:04 AM

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.

Alan Hope · 09:48 AM

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.

28th November 2011, 10:47 PM	#1
Alan Hope diyAudio Member Join Date: Nov 2004 Location: Glasgow	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. __________________ FLAC, Ethernet over Mains, SB3, GD Audio DAC 19, Tubelab SE 45, FE206eN in Scotmoose Sachikos with Fostex FT17h supertweeters 0.68uF cap.

29th November 2011, 11:07 PM	#2
Alan Hope diyAudio Member Join Date: Nov 2004 Location: Glasgow	A shorting tube. Ordered another - tested and 1 yr guarantee. __________________ FLAC, Ethernet over Mains, SB3, GD Audio DAC 19, Tubelab SE 45, FE206eN in Scotmoose Sachikos with Fostex FT17h supertweeters 0.68uF cap.

30th November 2011, 01:42 PM	#4
Alan Hope diyAudio Member Join Date: Nov 2004 Location: Glasgow	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. __________________ FLAC, Ethernet over Mains, SB3, GD Audio DAC 19, Tubelab SE 45, FE206eN in Scotmoose Sachikos with Fostex FT17h supertweeters 0.68uF cap.

17th December 2011, 09:04 AM	#9
Alan Hope diyAudio Member Join Date: Nov 2004 Location: Glasgow	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. __________________ FLAC, Ethernet over Mains, SB3, GD Audio DAC 19, Tubelab SE 45, FE206eN in Scotmoose Sachikos with Fostex FT17h supertweeters 0.68uF cap.

14th January 2012, 09:45 AM	#10
Alan Hope diyAudio Member Join Date: Nov 2004 Location: Glasgow	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. __________________ FLAC, Ethernet over Mains, SB3, GD Audio DAC 19, Tubelab SE 45, FE206eN in Scotmoose Sachikos with Fostex FT17h supertweeters 0.68uF cap. Last edited by Alan Hope; 14th January 2012 at 09:48 AM.

30th November 2011, 01:05 PM	#3
jrobson diyAudio Member Join Date: Aug 2011	Good luck with the replacement... Are you hooking this up to your Sachikos?

1st December 2011, 08:10 AM	#5
jrobson diyAudio Member Join Date: Aug 2011	Good luck I guess we are in the same boat

8th December 2011, 06:22 AM	#7
jrobson diyAudio Member Join Date: Aug 2011	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.

16th December 2011, 01:35 PM	#8
jrobson diyAudio Member Join Date: Aug 2011	Hi Alan Did you get your replacement tube?

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