It's difficult to validate your wiring, especially on the PT primary, with the pictures only.
As per the schmatic you posted, your PT needs to be connected like this to the AC side:
For 230Vac In:
Black = Neutral
Bridge Brown to Gray
Blue = Phase
For 240Vac In:
Black = Neutral
Bridge Brown to Gray
White = Phase
6.3Vac Heater is Gray/Pink (I hope you did not mix up the two gray)
2nd 6.3Vac Heater is Brown/Brown with CT (Black)
HV is Purple/Purple with CT Gray (again, I hope it was not mixed with the other Grays)

just my 2c
Blues

Hallo,
 ich biete einen MESIA ZOOM M-60T Gitarrenverstärker (60W Vollröhre) im Auftrag eines Freundes an.
Der Verstärker wurde zu letzt im November 2015 ber Tubeampdoctor überholt und danach selten benutzt.
Der Verstärker ist voll funktionsfähig, nur der Reverbpoti kratzt etwas.
Der Standort ist in Mannheim-Almenhof, kann aber auch versendet werden.
Einen Schaltplan gibt es auch.
Versandkosten etwa 30 Euro.
Der Preis ist 380 Euro.
Gruß
Manfred

Ah, so the filament winding for the rectifier tube supports both 5 and 6.3 volts. In that case, at least this part might be correct.
I find it suspicious that the indicator light doesnt work, this part is clearly before any transformer is involved. Just out of curiosity, did you check the fuse in the AC inlet socket?

I would definitely go through all the windings systematically, measuring their DC resistance with the amplifier disconnected from the mains, of course and all tubes removed.

The primary winding (blue to black) should read X ohms. This exact same resistance can also be checked on the Live and Neutral tap in the Power Inlet Socket. This would rule out any breaks in the Fuse / Switch chain.

The secondary windings should be checked  for continuity as well. Important is to pull all tubes, otherwise you read their filament resistance rather than the low resistance on the filament windings.

Hope this helps.

Hi Geronimo,

I followed both the lay-out and the diagram that was provided with the transformer... But since the lay-out differs from the diagram, it was quite a puzzle...

https://media.tubetown.net/cms/userfiles/downloads/tt-18w-layout.pdf

Hi Tim,

WARNING!
Please do NOT power up the amplifier again until this has been checked and corrected!

Something about your wiring doesnt look right to me, and Im concerned that it could cause serious damage.

First of all, Im not familiar with the transformers wire color coding or the kit itself.

From the pictures I assume the amplifier uses an EZ81 rectifier tube. However, the filament connections appear to use two different wire colors, which doesnt make sense to me.

Since there is only one PINK wire, I strongly suspect that it is actually the high voltage secondary center tap, rather than a filament connection.

1.) Check the Transformer Secondary Windings
With the amplifier completely disconnected from the mains and all capacitors safely discharged, use an ohmmeter to measure:

- PINK to PURPLE
- PINK to GREY

One of these combinations should read open circuit (infinite resistance).
The other might show something around 20 - 50 ohms, possibly more.

Based on these readings, we should be able to identify which wires belong to which winding.

My suspicion is that:
- The open circuit pair: Likely the 6.3 V filament winding for the EZ81 (pins 4 and 5).
- The pair showing resistance to PINK: Likely the high voltage secondary winding, with PINK being its center tap.

If confirmed against the transformers specifications, the PINK center tap would connect to ground through the designated fuse, while the two outer high voltage wires would connect to the EZ81 anodes.

Please keep in mind: If the wiring is indeed incorrect, the EZ81 filament or even the power transformer may already have been damaged.

2. Check Primary-to-Secondary Isolation

Once the winding identification is sorted out, theres another important check:
Measure the resistance between every secondary wire and every primary wire - these are a lot of readings.

All these combinations MUST read open circuit (infinite resistance).
If you measure any continuity, something is seriously wrong, and the transformer must not be connected to mains power - period!!
Note that an ohmmeter check alone does not prove that the insulation is safe.

3. Transformer Identification

Could you please tell me the manufacturer and part number of the power transformer?
If theres a datasheet or wiring diagram available for download, Id be happy to take a look.

Until we can positively identify all the windings and verify the wiring, please do not power up the amplifier again!

Please note: Im not taking any responsibility for the above!

Best regards, 

Geronimo

Thanks again.These are the two photo's of the power-section wiring.

Nicht die Schnellantwort verwenden, sondern über den grünen Button "Antworten" den Editor aufrufen. Dort können dann Bilder angehängt werden.

Grüße, Dirk

Whatever I'm trying with the photo's, it's not working, sorry...

Hi, thanks a lot for your replies!

Enclosed some photos of my wiring. The white and orange cable are not connected, I heatshrinked them seperately first, then together. The black center tap goes to ground. I'll try to disconnect the heater wires this when I have time, and make some new measurements.

EDIT: Excuse me, somehow I'm not able to enclose some photo's that are 300kb per file... 

Versuche gerade mal überall rumzuklicken, dabei fällt auf, dass ich keine Berechtigungen habe andere Benutzerprofile aufzurufen.

Ein Fehler ist aufgetreten!
Du hast nicht die Berechtigung, auf diesen Bereich zuzugreifen