missi93

Re: G-PULTEC problems, please help!
« Reply #780 on: September 01, 2020, 07:38:44 AM »
Here is a Screenshot from a Real Time Analyzation with a 11dBu 1kHz signal going through the G-Pultec



missi93

Re: G-PULTEC problems, please help!
« Reply #781 on: September 01, 2020, 07:40:31 AM »
and another one , same signal , same level going through the Pulse Techniques.

Some impressive numbers.

Thanks for your time guys,
let me know what you think!

M.

missi93

Re: G-PULTEC problems, please help!
« Reply #782 on: September 01, 2020, 11:59:30 AM »
Hey again,

I still have one problem. After seeing the tube main voltage at 360V ! I upped the 2W resistor to 5,6k first and then 10k and now it's sitting around 280V. Is it still too high?

Isn't there a end point where it stops making sense to put higher resistors?
Or should I just go higher Ω until I reach the 250V recommended?

M.

gyraf

Re: G-PULTEC problems, please help!
« Reply #783 on: September 01, 2020, 02:28:09 PM »
That's an awfully high voltage - is your transformer correct type?

But yes, definitely best to be below 250V - that way your tube has a better chance of having a decently long life..

/Jakob E.
..note to self: don't let Harman run your company..

missi93

Re: G-PULTEC problems, please help!
« Reply #784 on: September 03, 2020, 08:32:30 AM »
Yes the values should be right, it is the Mono G-Pultec Transformer from Don' Audio with a 220V secondary.

I don't get why it outputs 300 or more.

I will make another overview soon, and see how much exactly I am getting from the transformer.

M.

Re: G-PULTEC problems, please help!
« Reply #785 on: September 14, 2020, 02:33:54 PM »
Yes the values should be right, it is the Mono G-Pultec Transformer from Don' Audio with a 220V secondary.

I don't get why it outputs 300 or more.

I will make another overview soon, and see how much exactly I am getting from the transformer.

M.

220VAC rectified = about 305VDC

Measure the AC off the trafo before connecting to the circuit - might give you a clue.

Gustav

Whoops

Re: G-PULTEC problems, please help!
« Reply #786 on: October 06, 2020, 01:21:57 PM »
I'm cleaning my workshop and found 2x G-Pultec pcb sets
I put the set for sale in the black market in case someone is interested:

https://groupdiy.com/index.php?topic=76070.0


 

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