Allen Bradley resistors and the 50 watt kit

Post by **VelvetGeorge** » Mon Dec 03, 2007 2:40 pm

In the diagram, the bottom input is the hi sens jack. When you plug into it, there is a 1M from tip to ground and 34k of series resistance.

When you plug into the low sense input, there is 1.068M from tip to ground and 68k in series.

george

toner · Post by **toner** » Mon Dec 03, 2007 2:44 pm

The switching jacks cause the parallel connection I mentioned. Here's a diagram.

rockstah · Post by **rockstah** » Mon Dec 03, 2007 2:47 pm

VelvetGeorge wrote:In the diagram, the bottom input is the hi sens jack. When you plug into it, there is a 1M from tip to ground and 34k of series resistance.

When you plug into the low sense input, there is 1.068M from tip to ground and 68k in series.

george

but.. but... both resistors on the board measure 33k.. further more i have tried a 33k and 68k right on the tube socket with a 1m on the jack and don't hear the difference i hear using the high and low stock jack configuration.

johnnymenudo · Post by **johnnymenudo** » Mon Dec 03, 2007 2:54 pm

So, where do we use our four 1 M ohm, and two 100K resistors that come with the kit? LOL

JM

rockstah · Post by **rockstah** » Mon Dec 03, 2007 2:57 pm

johnnymenudo wrote:So, where do we use our four 1 M ohm, and two 100K resistors that come with the kit? LOL

JM

1 for the high input on channel 1 - one for the high input channel 2

and two in the phase inverter circuit on the board. look at a digram of the main board.

100k's are plate resistors. of course there is one more 100k on the cathode follower of v2 ( v2b) and one in phase inverter.

toner · Post by **toner** » Mon Dec 03, 2007 2:57 pm

johnnymenudo wrote:So, where do we use our four 1 M ohm, and two 100K resistors that come with the kit? LOL

JM

Sorry man! I took this into left field (again).

johnnymenudo · Post by **johnnymenudo** » Mon Dec 03, 2007 3:10 pm

toner wrote:
johnnymenudo wrote:So, where do we use our four 1 M ohm, and two 100K resistors that come with the kit? LOL

JM
Sorry man! I took this into left field (again).

It's all good I am just not as techno savvy as you guys so when I try to describe where the resistors might go, I have to say things like the post by the blue wires that goes to 1 and 6 of V1 (100K), or the pins by the green wires that go to 1 and 6 of V3 (1M).

rockstah · Post by **rockstah** » Mon Dec 03, 2007 3:14 pm

johnnymenudo wrote:
toner wrote:
johnnymenudo wrote:So, where do we use our four 1 M ohm, and two 100K resistors that come with the kit? LOL

JM
Sorry man! I took this into left field (again).
It's all good I am just not as techno savvy as you guys so when I try to describe where the resistors might go, I have to say things like the post by the blue wires that goes to 1 and 6 of V1 (100K), or the pins by the green wires that go to 1 and 6 of V3 (1M).

look at the board diagrams on your metroamp CD.

johnnymenudo · Post by **johnnymenudo** » Mon Dec 03, 2007 3:24 pm

rockstah wrote:
johnnymenudo wrote:
toner wrote: Sorry man! I took this into left field (again).
It's all good I am just not as techno savvy as you guys so when I try to describe where the resistors might go, I have to say things like the post by the blue wires that goes to 1 and 6 of V1 (100K), or the pins by the green wires that go to 1 and 6 of V3 (1M).
look at the board diagrams.

Right, but the diagrams for George's recommended replacement points for the Allen Bradley resistors do not specifywhere you should put all of the 1M and 100K resistors that come with the NOS kit. I didn't want to just randomly guess which IM resistors and 100K resistors I should swap out.

rockstah · Post by **rockstah** » Mon Dec 03, 2007 7:36 pm

rockstah wrote:
VelvetGeorge wrote:In the diagram, the bottom input is the hi sens jack. When you plug into it, there is a 1M from tip to ground and 34k of series resistance.

When you plug into the low sense input, there is 1.068M from tip to ground and 68k in series.

george
but.. but... both resistors on the board measure 33k.. further more i have tried a 33k and 68k right on the tube socket with a 1m on the jack and don't hear the difference i hear using the high and low stock jack configuration.