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JIM OT Wiring?

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Offline Paulo3

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Re: JIM OT Wiring?
« Antwort #15 am: 15.06.2017 21:05 »
The values only make sense with tubes plugged in. You wouldn't read anything at the cathodes without tubes ...

According to the very low heater voltage: did you measure to ground or between pins 4/5 and 9 at the tubes? The latter is the right methode.

Cheers
 John

Greetings John

Your right the cathods wouldn't have any current without the tubes... ::)
And for the heathers I measured between the pins 4/5/9 and ground, that's the wrong way... :-\
I'm such a noob,thanks for making this clear to me.

As for the others values what's your opinion?

Thanks.

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Offline smid

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Re: JIM OT Wiring?
« Antwort #16 am: 15.06.2017 21:55 »
Hi,

what's your heater voltage AC between 4/5 and 9? If it is still far from 6.3V:
maybe check to proper cleaning of the heater supply wires before soldering them. They have a brownish insulation lacquer on the surface, that has to be scraped off.


VG
Andreas
« Letzte Änderung: 15.06.2017 22:03 von smid »

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Offline mceldi

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Re: JIM OT Wiring?
« Antwort #17 am: 15.06.2017 22:57 »
As for the others values what's your opinion?
Sorry, but I don't have any opinion on that; I didn't exactly have a close look. The voltages are far to low, especially at V2b. Are you sure about those 86V? 186V would be more conclusive (but still far to low). I'd check the whole construction and have a close look at all resistor values and don't forget the PSU.

@Andreas: the amp is running in a kind of way; it won't do that without working heaters.

Cheers
 John

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Offline smid

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Re: JIM OT Wiring?
« Antwort #18 am: 16.06.2017 00:11 »
Zitat
the amp is running in a kind of way; it won't do that without working heaters.
Just wanted to double-check.

VG
Andreas

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Offline Dirk

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Re: JIM OT Wiring?
« Antwort #19 am: 16.06.2017 10:33 »
Hallo,

86 V at the V2b is OK. Please see the updated schematics with the reference voltages.

Best regards, Dirk


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Offline Rattlehead

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Re: JIM OT Wiring?
« Antwort #20 am: 16.06.2017 14:20 »
Kurz OT, aber @Dirk:
Ist es Absicht, dass das Layout vom Jim nicht mehr verfügbar ist?
Grüße,
Jannis

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Offline Dirk

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Re: JIM OT Wiring?
« Antwort #21 am: 16.06.2017 14:52 »
Natürlich nicht, das liegt an den sch... Einstellungen
Ist wieder da.

Gruß, Dirk
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Offline Rattlehead

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Re: JIM OT Wiring?
« Antwort #22 am: 16.06.2017 15:50 »
Nur so:-) Dankschön!

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Offline Paulo3

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Re: JIM OT Wiring?
« Antwort #23 am: 16.06.2017 20:42 »
Hi.
In fact the value I read between the two green wires from the heater is 6.3 v~.
I'm sorry for my mistake.

According to the new diagram provided, my values aren't too far from the real thing.

Diagram:                                      My values:
V1a. Pin1.  134 v.                          V1a. Pin1.   124 v.

V1a. Pin3.  1v.                              V1a. Pin3.   0,98 v.

V1b. Pin6.  202v.                          V1b. Pin6.    197 v.

V1b. Pin 8.  60v.                           V1b. Pin8.    52 v.

V2a. Pin1.  173v.                          V2a. Pin1.   158v.

V2a. Pin3.  1,85v.                          V2a. Pin3.   1,72v.

V2b. Pin6.   86v.                           V2b. Pin6.    86v. 

V2b. Pin8.   0,77v.                         V2b. Pin8.    0,72v. 

V3 plate.    240v.                           V3 plate. 240v

V3 grid.      190v.                           V3grid.  183v. 

V3 anode.     5v.                            V3 anode 5,38v.


My Power supply

B1. 266v

B2. 248v

B3. 197v

B2 / B3. 50v.


The values are not exactly the same , but I think they may be in the acceptable range, I just need someone to confirm this to me so that I can use my amp without worries.

Another question, when I was making the measures, I noticed that 3 of the large capacitors from the psu had current from the metallic top to ground... Is this normal?

Just want to say a big thanks to those who lost some of they're time trying to help me.

Greetings.

Paulo.







   

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Offline Paulo3

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Re: JIM OT Wiring?
« Antwort #24 am: 16.06.2017 21:19 »
In the last post, I meant cathode instead of anode in the v3 values...