got my $70 Chinese 6L6 tube amp in the mail today

[RogerMexiko]

includes
-loaded PCB
-op & pwr xfmrs
think got the op xfmr connections and 8 Ohm speaker out wiring figured out.
also the pwr xfmr connections to the PCB, chassis gnd and how to get tne tubes in.
BIG question is how to wire the pwr xfmr to the AC plug
-
BUT got two red and two black wires not so sure about. here's a schematic, any suggestions would be greatly appreciated!!!
View attachment GT5EP VER C Schematic.pdf

 

[GoldenVulture]

Re: got my $70 Chinese 6L6 tube amp in the mail today

includes
-loaded PCB
-op & pwr xfmrs
think got the op xfmr connections and 8 Ohm speaker out wiring figured out.
also the pwr xfmr connections to the PCB, chassis gnd and how to get tne tubes in.
BIG question is how to wire the pwr xfmr to the AC plug
-
BUT got two red and two black wires not so sure about. here's a schematic, any suggestions would be greatly appreciated!!!
View attachment 77846

The circuit has it wired for 240/260 volts. Is that your power voltage or are you using 110/130 volts ?
I'm presuming your Red and Black wires are the 115v taps.

 

[RogerMexiko]

Re: got my $70 Chinese 6L6 tube amp in the mail today

The circuit has it wired for 240/260 volts. Is that your power voltage or are you using 110/130 volts ?
I'm presuming your Red and Black wires are the 115v taps.

Yes, 110/130 am running. Do you have any suggestions on how to wire the darn thing?

 

[GoldenVulture]

Re: got my $70 Chinese 6L6 tube amp in the mail today

Have you got a multi meter ? Test the black and red wires for continuity. There will be two pairs. Work out which red goes with which black. Connect your 110/130 to one of the pairs. Insulate the other pair.[ don't tie them together ]Red should probably be connected to the active side of the power coming in .[ after the fuse and switch ]
As in the schematic: just leave out connecting one of the 115v taps.

 

[RogerMexiko]

Re: got my $70 Chinese 6L6 tube amp in the mail today

Yes, have a multi meter. Thanks for your help...if you hear no more from me I have been electrocuted by a cheap Chinese amp. Other wise I will report on how it works/sounds.

 

[Darg1911]

Re: got my $70 Chinese 6L6 tube amp in the mail today

With dual voltage primary PT's that I have had, for 120V, the wires were paired connecting the windings in parallel.
this ... http://www.classictone.net/40-18017.pdf
and this http://www.hammondmfg.com/5CHook.htm

 

[GoldenVulture]

Re: got my $70 Chinese 6L6 tube amp in the mail today

With dual voltage primary PT's that I have had, for 120V, the wires were paired connecting the windings in parallel.
this ... http://www.classictone.net/40-18017.pdf
and this http://www.hammondmfg.com/5CHook.htm

Which I presume would be Red and Red connected to each other and Black and Black connected to each other.[ Have to be in phase ]
Yes this connection will deliver full current.:friday:

 

[GilmourD]

Re: got my $70 Chinese 6L6 tube amp in the mail today

Linkage to amp?

 

[GoldenVulture]

Re: got my $70 Chinese 6L6 tube amp in the mail today

Linkage to amp?

#1 - GT5EP VER C Schematic.pdf -

 

[GilmourD]

Re: got my $70 Chinese 6L6 tube amp in the mail today

#1 - GT5EP VER C Schematic.pdf -

I meant the kit that he purchased.

 

[RogerMexiko]

Re: got my $70 Chinese 6L6 tube amp in the mail today

Linkage to amp?

contact - yongdong pan <kldguitar@yahoo.com>
GT5 amp (PT + assembled PCB + OPT) $70 shipped

http://kldguitar.com/KLDguitar-English/KLDguitar-assembled-kits-of-guitar-amp-1.htm

http://www.ebay.com/itm/PCB-with-components-of-5w-6l6-Class-A-SE-for-DIY-tube-guitar-amp/272525687729?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D38530%26meid%3Dfc573713a3454acdb4107885d4910928%26pid%3D100033%26rk%3D1%26rkt%3D7%26sd%3D272525687729

 

[RogerMexiko]

Re: got my $70 Chinese 6L6 tube amp in the mail today

Which I presume would be Red and Red connected to each other and Black and Black connected to each other.[ Have to be in phase ]
Yes this connection will deliver full current.:friday:

Wired red to red to AC +, black to black to AC return and am getting only 50% voltage reading at J20 - J23 points. Tried individual red/black pairs and get the same reading. Is there some toroidial PT wiring alternative that will get the full voltage to the board?

 

[GoldenVulture]

Re: got my $70 Chinese 6L6 tube amp in the mail today

J20 and J21 should be 260V
J22 and J23 should be 6.3 V
These are both A.C. connections. Is your MM set to A.C. ?
I hope you weren't trying to read J20 to J23, they're two separate coils.

 

[RogerMexiko]

Re: got my $70 Chinese 6L6 tube amp in the mail today

J20 and J21 should be 260V
J22 and J23 should be 6.3 V
These are both A.C. connections. Is your MM set to A.C. ?
I hope you weren't trying to read J20 to J23, they're two separate coils.

J22 and J23 are reading a shade over 3V.
MM is set to A.C.
Reading from ground to J22 then from ground to J23. Same with reading technique for J20 and J21 which read ~130.

 

[GoldenVulture]

Re: got my $70 Chinese 6L6 tube amp in the mail today

J22 and J23 are reading a shade over 3V.
MM is set to A.C.
Reading from ground to J22 then from ground to J23. Same with reading technique for J20 and J21 which read ~130.

No: read straight from each terminal, there's no ground connection at that point.
J20 - J21
J22 - J23

 

[RogerMexiko]

Re: got my $70 Chinese 6L6 tube amp in the mail today

No: read straight from each terminal, there's no ground connection at that point.
J20 - J21
J22 - J23

J20 - J21 reads 130.

 

[GoldenVulture]

Re: got my $70 Chinese 6L6 tube amp in the mail today

Wired red to red to AC +, black to black to AC return and am getting only 50% voltage reading at J20 - J23 points. Tried individual red/black pairs and get the same reading. Is there some toroidial PT wiring alternative that will get the full voltage to the board?

Is there a pinout/wire diagram for the transformer with the kit or on the transformer ? Brand and model number ?
Or a gutshot pic ?

 

[RogerMexiko]

Re: got my $70 Chinese 6L6 tube amp in the mail today

Is there a pinout/wire diagram for the transformer with the kit or on the transformer ? Brand and model number ?
Or a gutshot pic ?

none of the above. thinks ts a bum PT. think I have a champ type PT in a box somewhere, maybe give it a try, voltages don't mach up exactly but will swap out the 6L6 with a 6V6 and see what happens. Meanwhile, fighting the Chinese about all this and they seem to be trying to help but are insisting that the PT is good even after sending them pictures of the hookup and meter reading 130V instead of 260V.

 

[GilmourD]

Re: got my $70 Chinese 6L6 tube amp in the mail today

contact - yongdong pan <kldguitar@yahoo.com>
GT5 amp (PT + assembled PCB + OPT) $70 shipped

http://kldguitar.com/KLDguitar-English/KLDguitar-assembled-kits-of-guitar-amp-1.htm

http://www.ebay.com/itm/PCB-with-co...4910928&pid=100033&rk=1&rkt=7&sd=272525687729

Since you posted this I've been trying to get to kldguitar.com but for some reason I'm not getting a clean route to it. I checked http://downforeveryoneorjustme.com/http://www.kldguitar.com and it seems to be just me... So, weird.

Is the site working for you?

 

[RogerMexiko]

Re: got my $70 Chinese 6L6 tube amp in the mail today

No trouble at all connecting. If you want info contact yongdong pan <kldguitar@yahoo.com> he is really helpful, knows the products inside out and if he doesn't know something he has engineering department he contacts and gets quick responses.