VVR2 Liverpool layout help...pretty please?

[Tubetwang]

Thanks for all the help Steve.

I will work on it today, if i have some time, but will report back for the record.

Steve i really appreciated your help and to all others who took time to write.

Louis

[Tubetwang]

Tubetwang,

I reposted the layout. See above.
My apologies for the incorrect layout before.
The power path should be:
Wire from rectifier diodes to One lug of Stand-by switch >
Other lug of stand-by switch to VVR B+ IN >
VVR B+ Out to 1K/25W Resistor.

I was a little confused earlier because the Ceriatone layout is a bit different than a regular Liverpool. Especially on the power supply.

Also I think?? that your pot is wired backwards. That shouldn't be an issue though. It just means that full power will be at full counter clock-wise. and 10% power will be at full clock-wise.

Also I strongly suggest you follow Dana's recommendations and install the two caps and resistors. Otherwise you'll be getting all kinds of noises.
I can help you with that if you're having trouble following the instructions.

Hope this helps. I have to go, but I'll check back tomorrow.

Steve

double post

[Tubetwang]

Tubetwang,

I reposted the layout. See above.
My apologies for the incorrect layout before.
The power path should be:
Wire from rectifier diodes to One lug of Stand-by switch >
Other lug of stand-by switch to VVR B+ IN >
VVR B+ Out to 1K/25W Resistor.

I was a little confused earlier because the Ceriatone layout is a bit different than a regular Liverpool. Especially on the power supply.

Also I think?? that your pot is wired backwards. That shouldn't be an issue though. It just means that full power will be at full counter clock-wise. and 10% power will be at full clock-wise.

Also I strongly suggest you follow Dana's recommendations and install the two caps and resistors. Otherwise you'll be getting all kinds of noises.
I can help you with that if you're having trouble following the instructions.

Hope this helps. I have to go, but I'll check back tomorrow.

Steve

I rewired the board and rewired the pot.

Got sound but weird noise as well...

Installed a .1uf cap and a 1 Meg resistor between pin 2 and pin 7 of V1.

Also soldered a .1uf cap and a 1 Meg resistor to wire from volume pot to pin 2 of V1.

Also removed the 1 Meg resistor on the Liverpool's guitar input jack.

Plugged her in and blew the amp's fuse...

[Tubetwang]

Ok. it's coming along fine...

Dana sent instructions by e-mail but the pictorals and schematic does'nt appear on my computer nor when i printed it on Textedit...
Something wrong with my computer probably...

Anyway if someone could point me in the right direction here...
"This kind of implementation will require you to move the 1 meg resistor on your guitar input jack..."
I'd like to know where to move this 1 meg resistor to?

Also..."...and the installation of a cap between the input and the grid of the first tube."
That .1uf cap would be between pin 2 and pin 7 on V1?

Thanks,
Twang

[Colossal]

Ok. it's coming along fine...

Dana sent instructions by e-mail but the pictorals and schematic does'nt appear on my computer nor when i printed it on Textedit...
Something wrong with my computer probably...

Anyway if someone could point me in the right direction here...
"This kind of implementation will require you to move the 1 meg resistor on your guitar input jack..."
I'd like to know where to move this 1 meg resistor to?

Also..."...and the installation of a cap between the input and the grid of the first tube."
That .1uf cap would be between pin 2 and pin 7 on V1?

Thanks,
Twang

Hi Twang,

I've attached a quick drawing that will hopefully help you out with both questions. Good luck!

Regards,
Colossal

[Tubetwang]

Thanks Colossal.

I appreciate your help!

Twang

[castor]

This is right...

1M res goes always to ground. You have to put the .1 cap between the input and one side of the resistor.. after that the grounded wire goes to 1 section of the 1st 12AX7.

mine works very good between 1/3 to max, while with the lowest volume I lose distorsion and feeling.. but no problem.. at home I use the airbrake and the vvr between half and max...

At the end you should have the same or a bit low noise thant the amp without the vvr.. if you have extranoise try moving the vvr circuit in another place.

castor

[Tubetwang]

Thank Castor for your help!

Back to work and i should be ok for a final soon...

Twang

[castor]

Sorry.. I see now..
It seems that you inverted the wires from the vvr board to the pot! you have to consider the wires as if you are soldering the pot on the top of the board, not below as in your pic 1...
in this way you will increase the volume turning the pot down..
but you can do as you want... it does not change

another thing: the amp should sound good without the extra 2 res and caps.. they will reduce/cancel the noise when you rotate the volume pot on the guitar or on the amp.. I heard it only with high reduction... low position of the pot..

since on the vvr and his cables will flow only DC... you should have no problem moving or using long cables..
mine is located youst opposite to the pre part of the board and the vvr pot and the board is on the back of the amp... the 4 wires (2 for the DC and 2 for the bias) start from there... pass below the output and impedance selector.. pass on the side of tha chassis just near the supply board.. pass near the 2 switch (standby and power) and I have no extra noise...or a very low extra noise


castor

[Tubetwang]

well...i've given it a full 8 hours non stop...i've got a comprehensive wife and 12 year old...

It has gone from almost there to really bad...so i'm calling it a day...

But i'll be back at it tomorrow with a vengeance...

Time to hit a shower and having some family time...

Thanks to all who have help and stay tune...

I'LL BE BACK!!!!

[kineteks]

I'm giving Dana's VVR2 a try as well, I sent this doctored Ceriatone layout to him and got the OK... as soon as I get the caps and resistors in I'll solder it in and report back....


7-28 update... Drawing updated & a couple more details from Dana....

I have attached an updated drawing. I like to put the first two filter caps after the diodes and before the standby switch. You then go from the diodes/caps to the standby switch, out of the standby switch to the B+ in on the VVR and from the VVR B+ OUT to the 1k 25w resistor and the OT center tap.

It .... doesn't matter if the standby switch is before or after the VVR. You can do it either way. Just make sure the first two 47uf caps that are in parallel are before the standby switch and the VVR.

Note that a wire has been added between the diodes and the filter caps & one removed between the filter caps and the 1k 25w resistor. The wire to VVR2 B+ IN now comes from the filter caps, not the diodes.

[Pongo316]

I'm giving Dana's VVR2 a try as well, I sent this doctored Ceriatone layout to him and got the OK... as soon as I get the caps and resistors in I'll solder it in and report back....

is it possable to do the same with a Liverpool Ceriatone layout some one please ?

I'm not that computer literate to be able to ajust the layouit and have a vvr2 to install into a express version very soon , If I/we could get a layout that would be very help full.

[kineteks]

Ceriatone layout updated and suggestions from Dana added...

[Pongo316]

My bad I meant Express

[Tubetwang]

Thanks to Kineteks, Dana and everyone else for great help, layouts and tips...

I finally saw the light...

Thanks to Dana for conceiving a fine and affordable product!

HIGHLY RECOMMENDED!!!!!!!!!

Twang