Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - tonyharker

Pages: 1 ... 8 9 [10]
136
Amplifier Discussion / Re: fender deluxe 112 plus- loud humm
« on: October 21, 2007, 05:59:26 AM »
With that large amount of hum, and the Caps getting hot it could be that the rectifier is (partly) shorted and you are getting a high ac ripple.  Check it out using the diode function on your DMM.

137
Preamps and Effects / Re: tone frequencies
« on: September 26, 2007, 02:30:18 PM »
If you check out and download the Tone Stack Calculator on this page http://www.duncanamps.com/software.html It may give you some ideas.

Tony.

138
Amplifier Discussion / Re: Crate GT212 Blowing Fuses
« on: September 15, 2007, 02:31:39 PM »
If its new send it back,  if you mess with it you will invalidate the warranty.

Don't whatever you do put a larger fuse in!

Tony

139
Schematics and Layouts / Re: No battery fuzz
« on: September 05, 2007, 04:49:13 AM »
The schematic is still there - you have to register with diystompboxes to see it.

140
Hi FSX  Ive designed and made quite a few PCBs.  What circuit are you interested in having made?   I maybe able to help you.  Are you wanting to make the PCB yourself if you have a design, or do you want someone to make it for you? 
Do you want to solder the components on the board? 

Tony.

141
Amplifier Discussion / Re: Fetzer Ruby problem
« on: August 05, 2007, 03:06:41 PM »
I have a few further questions for you:

have you any photos of your construction you can show us?
What did you build the circuit on - PCB or Perfboard?
What is your supply, battery or ???   If you are using a battery is it a good one?
What FET did you use and are you sure it is the right way round? 
What source are you using - a Guitar?
Have you tried feeding the input directly into the top of the volume control?
Have you adjusted the drain of the FET to 4.5 volts?

Sorry about the Qs but it is necessary to find out exactly what you are doing.

Tony.

142
Amplifier Discussion / Re: Fetzer Ruby problem
« on: August 04, 2007, 03:05:14 PM »
Did you just put the Fetzer valve circuit in front of the Ruby circuit or did you replace the Ruby FET with the Fetzer FET?

143
Amplifier Discussion / Re: Hexfred and zener
« on: July 15, 2007, 01:32:17 PM »
Why would you want to do that?  You would have to wire it in reverse and the breakover voltage would be in the hundreds with allowed inverse current very small in microamps. Otherwise you would destroy the diode!

144
Amplifier Discussion / Re: help with issue in my amp
« on: June 27, 2007, 11:17:05 AM »
You could have a ground loop.  The grounds should all go separately to one point ideally on one of the smoothing capacitors.  If you have connected the grounds to one another then that is the problem.  Also the input jack ground should be isolated from the chassis and go directly to the input ground connection.

Do you have a schematic/diagram you can show us?

Tony

Pages: 1 ... 8 9 [10]