Let's try this again

Get support and show off your MetroAmp JTM 45 kit builds.

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j.christopher
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Re: Let's try this again

Post by j.christopher » Wed Nov 03, 2010 6:18 pm

V3
P1--- 232
P2
P3--- 41
P4---3
P5---3
P6---227
P7---
P8---41
P9---3
"When your dumb you gotta be tough"

j.christopher
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Posts: 45
Joined: Sun Oct 24, 2010 10:33 am
Just the numbers in order: 7

Re: Let's try this again

Post by j.christopher » Wed Nov 03, 2010 6:24 pm

V4
P1---
P2---3
P3---438
P4---441
P5---neg 37
P6---440
P7---3
P8---
P9---
"When your dumb you gotta be tough"

j.christopher
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Posts: 45
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Re: Let's try this again

Post by j.christopher » Wed Nov 03, 2010 6:27 pm

V5
P1---
P2---3
P3--- 440
P4--- 441
P5---neg 36
P6---440
P7---3
P8---
P9---
"When your dumb you gotta be tough"

j.christopher
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Posts: 45
Joined: Sun Oct 24, 2010 10:33 am
Just the numbers in order: 7

Re: Let's try this again

Post by j.christopher » Wed Nov 03, 2010 6:36 pm

V6
P1---
P2---290,
P3---
P4---AC=322
P5---
P6---AC=322
P7---
P8---326,
P9---

P2&8===4v ac
"When your dumb you gotta be tough"

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toner
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Location: Iowa

Re: Let's try this again

Post by toner » Wed Nov 03, 2010 8:54 pm

Voltages look okay if you measured without tubes installed. Some of the rectifier (V6) voltages are off though. It doesn't look like it's wired correctly in your pics but you probably changed it after the picture.

Still no volume?

j.christopher
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Re: Let's try this again

Post by j.christopher » Wed Nov 03, 2010 9:31 pm

toner wrote:Voltages look okay if you measured without tubes installed. Some of the rectifier (V6) voltages are off though. It doesn't look like it's wired correctly in your pics but you probably changed it after the picture.

Still no volume?
Success!!!
Goddamn!! what a hell of a tone!! woo hooo! :jimi:
your right I found another wiring mistake...
I would describe it but I don't know how properly..
still can't set the bias though, it measures 31.8 mv at pin 8 v4&5 respectively..and doesn't move when you turn the adjustment
dose it matter if it's on a 8 or 16 ohm to set it?
I only have 8 and 4 ohm cabs here.
"When your dumb you gotta be tough"

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toner
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Re: Let's try this again

Post by toner » Wed Nov 03, 2010 9:51 pm

j.christopher wrote:dose it matter if it's on a 8 or 16 ohm to set it?
Doesn't matter.

Are you measuring mV across the 1 ohm resistors to set bias? Does the bias pot vary the negative voltage on pin 5 of the power tubes? If not, something is not wired correctly in the bias section. Make sure it is grounded properly with the correct jumpers under the board.

j.christopher
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Re: Let's try this again

Post by j.christopher » Wed Nov 03, 2010 10:21 pm

toner wrote:
j.christopher wrote:dose it matter if it's on a 8 or 16 ohm to set it?
Doesn't matter.

Are you measuring mV across the 1 ohm resistors to set bias? Does the bias pot vary the negative voltage on pin 5 of the power tubes? If not, something is not wired correctly in the bias section. Make sure it is grounded properly with the correct jumpers under the board.
Damn I wired that wrong as well :oops: got the bias set at 42.8 on both! :champ:

I guess I should'a listened when they say go to bed and do more the next day

too late too crank it up now.. :rocker:
"When your dumb you gotta be tough"

j.christopher
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Posts: 45
Joined: Sun Oct 24, 2010 10:33 am
Just the numbers in order: 7

Re: Let's try this again

Post by j.christopher » Thu Nov 04, 2010 7:06 am

toner wrote:
j.christopher wrote:dose it matter if it's on a 8 or 16 ohm to set it?
Doesn't matter.

Are you measuring mV across the 1 ohm resistors to set bias? Does the bias pot vary the negative voltage on pin 5 of the power tubes? If not, something is not wired correctly in the bias section. Make sure it is grounded properly with the correct jumpers under the board.
I want to thank you for holding my hand through out this...
I really appreciate it!! :toast:
"When your dumb you gotta be tough"

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toner
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Location: Iowa

Re: Let's try this again

Post by toner » Thu Nov 04, 2010 3:36 pm

No problem. We've all been there. I just share what little I know when I can. Enjoy your amp. 8)

j.christopher
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Re: Let's try this again

Post by j.christopher » Thu Nov 04, 2010 8:58 pm

This amp is nothing but the truth!~~~~~~~~~~~~~~~~~~~~ :jimi:

master volume.?????....thats just crazy!!!
even on 4 it has killer sustain and plenty of crunch..on 6 it all Monterey --- no buttons to push
just add tube screamer and wah...and.. :hairband:

just 2 criticisms of metro amp....
1; have someone dress those chassis'...I spent the first hr of the build bleeding everywhere, there are some sharp edges...
2: tell some one to buy a new drill bit once in a while and you wouldn't have to file chassis openings..drill bit sides actually ware faster on aluminum.

other than that
thanks for a killer head! :rockon:
"When your dumb you gotta be tough"

j.christopher
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Posts: 45
Joined: Sun Oct 24, 2010 10:33 am
Just the numbers in order: 7

Re: Let's try this again

Post by j.christopher » Fri Nov 05, 2010 7:56 am

Now I want to sell it and build another!!!
or maybe keep it and build a 100 watt and sell that cause I surely don't need any
more volume
"When your dumb you gotta be tough"

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