New build tw
Moderators: pompeiisneaks, Colossal
Tw new build
Did 6 different tubes all great think tube socket bad waiting. For new ones in mail... The wires on that socket make noise when hit with chop stick I mean a thump not microponic never heard a amp do this ,and only on 3 wires on on sockets everything around I checked and again again.. Can a socket mess things up that bad???
New Amp maker
Re: New build tw
Where is the ground for the buss wire?
Tw new build
Took the wires of bright switch if touched it also made to much noise .... All noise went away even tube and the 3 wires to v1 but still no guitar sound ... Amp makes sound and volume makes it louder does . Bright switch was hooked up to volume control volume control was suspect but ounce bright switch was disconnected from volume pot it stopped the thump noise ... So now no bad noise but no guitar sound either what now???? I know the tw amp build is one of the amps hard to build and sound good but I have no guitar signal I put extra ground on input jack no help ...
New Amp maker
Re: New build tw
1) You don't need to put the ground buss on the pots. I don't see why anyone does it. Soldering to the pot body is an excuse to fubar the pot.
2) Post some pictures. If you get lucky, someone will see something. Your descriptions aren't telling us much.
3) On that extra ground, do a search for "ground loop." You need to remove it.
2) Post some pictures. If you get lucky, someone will see something. Your descriptions aren't telling us much.
3) On that extra ground, do a search for "ground loop." You need to remove it.
Re: New build tw
DMM jacks for bias are suspect. should go from pin 1-8 on EL34's to DMM jack through 1R to ground jack. You have pin 1-8 to ground and then to DMM bias jack.
I suspect what has already been stated the no ground on V1 cathode. Maybe other grounds on pots do not work.
Mark
I suspect what has already been stated the no ground on V1 cathode. Maybe other grounds on pots do not work.
Mark
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Tw new build
I went back to stock pot on ps board, the pic is from 2 weeks ..... I replaced v1 & v2 tube socket got 1.5 volts on pin 8 v1. Did not have before new socket still no guitar sound..Iam just about ready to bring to a shop ,, In sf it cost if they will even look at it .. They like easy jobs
New Amp maker
Re: New build tw
LOL, labor rates:
$80/hour
$120/hour if you want to watch
$160/hour if you fixed it first
You decide which one fits.
$80/hour
$120/hour if you want to watch
$160/hour if you fixed it first
You decide which one fits.
Re: New build tw
Here's mine.Phil_S wrote:LOL, labor rates:
$80/hour
$120/hour if you want to watch
$160/hour if you fixed it first
You decide which one fits.
$75/hr
$150/hr if you want to watch, no beverages are included
$225/hr to go behind or fix a build that someone cobbled up and it's a two hour minimum.
TM
Re: New build tw
I don't do it for a living. I had to guess at rates 
As they say, there is truth in jest.
Batman, so you understand, if you bring this to a tech, he needs to have a good schematic and a layout diagram, too, if available. Then he probably needs to trace out and verify the whole build, except maybe if something is obviously wrong and happens to be the fix needed. There is every chance there are several problems to be corrected and a worthy tech will not want to allow the item to leave his bench in less than 100% condition. Included in the problems to be fixed are any places where construction is not "workman-like" appropriate. This is not a normal repair of a production amp like Fender or Marshall. I think you are looking at 2 hours minimum.
As they say, there is truth in jest.
Batman, so you understand, if you bring this to a tech, he needs to have a good schematic and a layout diagram, too, if available. Then he probably needs to trace out and verify the whole build, except maybe if something is obviously wrong and happens to be the fix needed. There is every chance there are several problems to be corrected and a worthy tech will not want to allow the item to leave his bench in less than 100% condition. Included in the problems to be fixed are any places where construction is not "workman-like" appropriate. This is not a normal repair of a production amp like Fender or Marshall. I think you are looking at 2 hours minimum.
New build tw
Layout and schematic are on this site ... The kit is from rj guitar,who is a hell of a nice guy I wish there was some one out there who built this amp and was dead on with out debugging it so far I have change out v1 and v2. Sockets and cleaned up everything I could ..... Hey I am a teamster retired al most 60 this is some thing I always wanted to do ,high on bucket list ... I am not a amp tec and not very good with my hands, but I am real close to pulling this off ....so please some one look at layout it's on this site you may see some thing I don't And as far as money .i did not do this to save money hell I got 15 great amps but none I made ,this is the point. And I called 2 of the best techs in sf bay area they won't even touch home made builds to easy to just put master volumes and bias amps...it's different here... So please look at layout before making me fell shity .its about trying some thing new .i have tried some of the things people said with out any results.. New tube sockets got me readings I did not have before but still no guitar sound.. Thanks all
New Amp maker
Re: New build tw
You need better pictures if you want folks here to try to sort it out.
Re: New build tw
And up to date pics!Firestorm wrote:You need better pictures if you want folks here to try to sort it out.
If you are comfortable working with the amp while powered up and with a speaker connected try a disturbance test. Set your dmm to VAC and clip one probe to the chassis and take the other lead and touch the power tube grid and PI input grid. You should get a pop sound when touching the the grids. This will verify the output section is working. If you do get a pop doing this continue to move towards the input touching the various grids. When the pop diminishes you are in the area of the problem.
Only use one hand, keep the other behind your back....
Re: New build tw
Batman: I am not speaking for others, but they probably will share my thoughts. I don't believe anyone here is trying to make you feel bad about anything. Sometimes we make small jokes about what is happening. It's human nature but it isn't personal. Also, you can be assured you aren't the only 60+year old here. I think you've come to the right place. Stick with us for a while. Please be patient.
Everyone of us had a first amp that we had to troubleshoot. I think it is pretty rare for a first build that anything but the simplest build fires up without a hitch. It happens you picked a relatively advanced project for your first one.
My read of the comments is that people are simply being direct. This is the best way to be clear. Yes, we are being a little hard on you, but it is with good intentions. Remember, we aren't in the room with your amp, so we try for the next best thing...voltage readings and pictures. These are essential for group participation.
So far, it seems that parts of the amp are working. You are probably close to getting it to pass a guitar signal. Let us help you get that done. That means pictures and voltage readings. It's OK if you need a few days to post them. We aren't going any where. At this point, I think you might benefit from slowing down. Stop making changes that are just guesses. People here will post good advice.
Really, I expect you'll eventually get this done. You should have seen the thread on my first amp (at another forum). It was a long time ago. I think it went for pages and pages and took weeks before I got it all right.
I think folks here will be sympathetic to your desire to finally build one. It is the common bond here.
+1 on the request for a pop test. Do that simple thing and report what you find.
Everyone of us had a first amp that we had to troubleshoot. I think it is pretty rare for a first build that anything but the simplest build fires up without a hitch. It happens you picked a relatively advanced project for your first one.
My read of the comments is that people are simply being direct. This is the best way to be clear. Yes, we are being a little hard on you, but it is with good intentions. Remember, we aren't in the room with your amp, so we try for the next best thing...voltage readings and pictures. These are essential for group participation.
So far, it seems that parts of the amp are working. You are probably close to getting it to pass a guitar signal. Let us help you get that done. That means pictures and voltage readings. It's OK if you need a few days to post them. We aren't going any where. At this point, I think you might benefit from slowing down. Stop making changes that are just guesses. People here will post good advice.
Really, I expect you'll eventually get this done. You should have seen the thread on my first amp (at another forum). It was a long time ago. I think it went for pages and pages and took weeks before I got it all right.
I think folks here will be sympathetic to your desire to finally build one. It is the common bond here.
+1 on the request for a pop test. Do that simple thing and report what you find.