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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 19th November 2019, 03:50 AM   #541
Duke58 is offline Duke58  United States
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There are a couple posts regarding wiring/grounding the TSE-II, but I don't really understand. Can someone post photos or a drawing of how to properly ground the board? There was mention about removing paint from the output transformers and/or grounding the board to the chassis, but it is confusing to me.

Thanks!
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Old 19th November 2019, 04:41 PM   #542
justmikey is offline justmikey  United States
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Default Wiring from TSE-II board to test jacks

I'll be installing some tip jacks in the top plate of my chassis to allow adjustments without opening up the amp. I have my trim pots on the same side as the tube sockets with small holes over them in the top plate.

Please check my plans for wiring these jacks.

For the driver tubes, I'll connect a thin wire to the lead of C9 and C11 on the driver side, with the other jack connected to ground. Two pairs of tip jacks, L and R. I'll use this to adjust the voltage on the driver tubes. 175V...correct? I hope the flying lead from the capacitors doesn't turn into a little antenna looking for him.

For the 300Bs, I'll connect a couple thin wires to each side of R18 and R29. Two pairs of tip jacks, L and R. I'll use this to adjust the current through the 300Bs. Measure the voltage and divide by 10 (R18, R29 = 10 ohm). 60 to 80 mA depending on the final B+...correct?

I'll also have a pair of tip jacks across R30 to measure B+.

The idea is to have several logically place small black top jacks on the top (or maybe back) of the black chassis to allow fiddling about without opening up the amp.
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Old 19th November 2019, 06:07 PM   #543
Duke58 is offline Duke58  United States
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Justmikey-- where are your plans for wiring these jacks?
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Old 19th November 2019, 10:43 PM   #544
elobilo is offline elobilo  Norway
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Quote:
Originally Posted by justmikey View Post
I'll be installing some tip jacks in the top plate of my chassis to allow adjustments without opening up the amp. I have my trim pots on the same side as the tube sockets with small holes over them in the top plate.

Please check my plans for wiring these jacks.

For the driver tubes, I'll connect a thin wire to the lead of C9 and C11 on the driver side, with the other jack connected to ground. Two pairs of tip jacks, L and R. I'll use this to adjust the voltage on the driver tubes. 175V...correct? I hope the flying lead from the capacitors doesn't turn into a little antenna looking for him.

For the 300Bs, I'll connect a couple thin wires to each side of R18 and R29. Two pairs of tip jacks, L and R. I'll use this to adjust the current through the 300Bs. Measure the voltage and divide by 10 (R18, R29 = 10 ohm). 60 to 80 mA depending on the final B+...correct?

I'll also have a pair of tip jacks across R30 to measure B+.

The idea is to have several logically place small black top jacks on the top (or maybe back) of the black chassis to allow fiddling about without opening up the amp.
This is exactly how I wired my tip Jacks on the top plates. Plus I wired at the same points to volt meters fir the 300bs and drivers I put in the front of the chassis. . Works very well for me.
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Old 19th November 2019, 11:53 PM   #545
Andrewbee is offline Andrewbee  Jamaica
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20191119_184234.jpg

Tip Jacks to measure 300B current on either side of Elmo. No it's not my bench anymore, its taken a life of its own.
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Last edited by Andrewbee; 19th November 2019 at 11:55 PM.
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Old 20th November 2019, 12:53 AM   #546
justmikey is offline justmikey  United States
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Quote:
Originally Posted by Duke58 View Post
Justmikey-- where are your plans for wiring these jacks?
I meant what was described in text, I did not draw any plans.
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Old 20th November 2019, 03:23 AM   #547
Duke58 is offline Duke58  United States
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"Originally Posted by justmikey View Post
I'll be installing some tip jacks in the top plate of my chassis to allow adjustments without opening up the amp. I have my trim pots on the same side as the tube sockets with small holes over them in the top plate.

Please check my plans for wiring these jacks."

Can you tell me what posting?
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Old 20th November 2019, 06:17 PM   #548
csample is offline csample  United States
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After a 14 year run, the TSE must DIE!
Quote:
Originally Posted by Duke58 View Post

Can you tell me what posting?


The written plans are in post 542.
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Old 20th November 2019, 06:32 PM   #549
randytsuch is online now randytsuch
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After a 14 year run, the TSE must DIE!
I put in a jack for b- too, but hardly ever use it.
It is easy to do while you're wiring the other jacks in.
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Old 21st November 2019, 06:02 PM   #550
rmyauck is offline rmyauck  Canada
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542? Don't see them!

Thanks!

Randy
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