Calling Rockstah - 1959 HW to 12xxx series spec

rockstah · Post by **rockstah** » Sun May 20, 2007 2:58 am

vkaxeman wrote:
vkaxeman wrote:
Is all of the voltage in the amp past/after the PT DC?

rockstah wrote:
its where u want your meter when trying to find out if the amp will kill u.
Thanks for the clarification!

At the beginning of this topic, you mentioned the following for 12xxx spec:
dual 16u preamp
32u PI cap
16u screens
50u mains
Curious, If I am understanding the spec correctly and I just ordered 32's for the screens, should I order a couple more 16's in case we need them later to get the dutch treat?

if u look at the dual 50 cans for the mains in the layout - they are jumpered. wired in parrallel adding up to 100u each for each can. then each of them is wired in series with each other adding up to 50u on the mains as shown in the diagram.

we are going to use two 32u cans for the screens, only using one side = 32u then they are wired in series adding up 16u on the screens.

we are going to use only one side of the 32+32 cap near the PT for 32u on PI.
u have all the cans u need for the dutch treat.

rockstah · Post by **rockstah** » Sun May 20, 2007 3:10 am

what do the 4 purple caps on the 4 diodes at the far end of the board say on them?

vkaxeman · Post by **vkaxeman** » Sun May 20, 2007 11:00 pm

rockstah wrote:what do the 4 purple caps on the 4 diodes at the far end of the board say on them?

2 are 473J 630v
2 are 473k 630v

rockstah · Post by **rockstah** » Sun May 20, 2007 11:10 pm

excellent. thanks for that. at one point we maybe removing them. time will tell.

vkaxeman · Post by **vkaxeman** » Sun May 20, 2007 11:24 pm

What do the caps on the diodes do?

vkaxeman · Post by **vkaxeman** » Mon May 21, 2007 7:57 pm

Rockstah,
George shipped my can caps today!
Thanks George!

rockstah · Post by **rockstah** » Mon May 21, 2007 7:58 pm

excellent. ill be out of town til monday night.

vkaxeman · Post by **vkaxeman** » Mon May 21, 2007 9:11 pm

Rockstah,
These the .1's I need?

rockstah · Post by **rockstah** » Mon May 21, 2007 9:14 pm

yes. grab them.

vkaxeman · Post by **vkaxeman** » Mon May 21, 2007 9:44 pm

Just sent payment for them.

I now have all the needed NOS Mustards heading this way!

vkaxeman · Post by **vkaxeman** » Mon May 21, 2007 10:40 pm

rockstah wrote:
vkaxeman wrote:
for the next mod u will need.

one: 16u+16U - http://store.metroamp.com/product_info. ... cts_id=240

three: 32u+32u - http://store.metroamp.com/product_info. ... cts_id=244

when u get them u can see where they are going go in this layout i drew up.

Rockstah,
Do I solder in the new caps exactly like in this picture or as currently wired?

Also, do the NOS mustards caps have polarity?

Thanks!

rockstah · Post by **rockstah** » Mon May 21, 2007 11:19 pm

vkaxeman wrote:
rockstah wrote:
vkaxeman wrote:
when u get them u can see where they are going go in this layout i drew up.

Rockstah,
Do I solder in the new caps exactly like in this picture or as currently wired?

Also, do the NOS mustards caps have polarity?

Thanks!

just like the picture. the two 32u caps that are for the screens will only be using one side of each cap. one 32u and one 32u can cap wired in series is 16u on the screens.

so right now you have two dual 50 caps that are jumpered to 100u in series = 50u on the screens. u wont be jumpering the new cans like these currently are. only one side of each 32u can cap will be used for the screens.

as well you will only use one side, one positive and the negative when wiring up the 32u for the PI = phase inverter cap. do not jumper this cap

the can under the board you will be wiring in the 32u exactly as you see the current 50u+50u cap that is there now. do not jumper this cap.

final note, none of your new can caps will be jumpered ed?

vkaxeman · Post by **vkaxeman** » Tue May 22, 2007 12:02 am

Got it!

One more question: Do the NOS mustards type caps have polarity?

rockstah · Post by **rockstah** » Tue May 22, 2007 12:04 am

vkaxeman wrote:Got it!

One more question: Do the NOS mustards type caps have polarity?

no.

vkaxeman · Post by **vkaxeman** » Tue May 22, 2007 12:12 am

Thanks! I really appreciate your time and help!!!!