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Messages - memoryman

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1
Schematics and Layouts / Peavey JSX MINI COLOSSAL gut shots
« on: September 19, 2016, 07:05:28 PM »
Just wanted to post these interior shots of the little Peavey JSX MINI for those who are curious. Just a little amp porn.

2
Tubes and Hybrids / Re: Identifying sections of tube amp
« on: February 07, 2016, 11:22:36 PM »
Thanks for the links phatt, it will give me lots of information to ponder.

3
Tubes and Hybrids / Identifying sections of tube amp
« on: January 22, 2016, 10:06:47 PM »
Trying to learn once again, so I guess I will raise my hand and ask a question makes my face turn red. So far I understand enough to work my way through and identify a power transformer and rectifier section...after that I am kinda lost as to what section is what on a tube amp. Can anyone give me a heads up on the various "sections" of a tube amp and how to identify them on the schematic as well as on an amp?

4
Tubes and Hybrids / Re: Traynor YGM Tone Stack
« on: November 19, 2015, 01:49:14 AM »
That video was made with the volume at about 5 with an attenuator on very low (or high).The change from the stock 4'x8' speakers to an old Celestion 12', that coupled with the capacitor mods are dramatic.Now when the amp turned up enough to move some air it sounds a whole lot like an old Marshall. Very dynamic, it really nails those ever illusive "in between" sounds.

5
Tubes and Hybrids / Re: Testing Resistors
« on: November 18, 2015, 06:26:05 PM »
Good idea Enzo I will do that, thanks :)

6
Tubes and Hybrids / Re: Testing Resistors
« on: November 18, 2015, 02:39:23 PM »
Thank you Roly its always good to hear from you.

7
Tubes and Hybrids / Re: Traynor YGM Tone Stack
« on: November 18, 2015, 12:21:26 AM »
Here is a video of the amp after it was finished, I like it.https://www.youtube.com/watch?v=G69D5xxZHOo

8
The Newcomer's Forum / Re: Truss rod or new axe?
« on: November 17, 2015, 10:00:13 PM »
Is it just the truss rod nut that is missing? That alone would obviously be an easy fix. If it is a more extensive problem, call a repairman.Try watching this video to get an idea of what might need to be done. https://www.youtube.com/watch?v=-Dm_5GDHT2A&ab_channel=stewartmacdonald

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Tubes and Hybrids / Testing Resistors
« on: November 17, 2015, 09:49:43 PM »
I just tested a 68K 10% and it tested at 76.7K ohms is it too far out of spec? How do I determine this for myself?

10
Tubes and Hybrids / Re: Traynor Traynor YGM-4
« on: August 23, 2015, 03:59:30 PM »
I have an old 1973 Celestion that seems to work fine that would be a good candidate.What would be the best way to make sure the cone and spider along with the rest of the mechanism are clean before I install the speaker? I'm thinking compressed air unless someone has a better idea that they would like to share.

11
Tubes and Hybrids / Traynor Traynor YGM-4
« on: August 23, 2015, 03:28:41 AM »
I have a 1972 Traynor Studiomate that has four 8" speakers in it. I am thinking of removing the speakers and replacing them with a new baffle and a 12" speaker. The speaker tap for the amplifier is 8 OHM and the speaker I would like to use is 16 OHM, would this be okay?

12
Tubes and Hybrids / Re: Traynor YGM Tone Stack
« on: August 23, 2015, 03:10:46 AM »
Thank all of you guys for your input. As per g1 and phatt I removed the capacitors that you mentioned and that definitely helped. :dbtu: I also am using a Weber MASS Attenuator which is working great.

13
Tubes and Hybrids / Airline JDR 8439
« on: August 13, 2015, 02:21:10 AM »
A signal will pass through three jacks marked "Sting Instruments" in the center but the others to the right marked "Microphone Accordion" will not pass a signal. The Vibrato/tremolo does not work and I am not sure if the jacks labeled so are for foot switch or for an instrument. What should I try first ? I hope the schematic is close, if anyone has a better one please post it. I believe that this is a 1955 Wards Danelectro amplifier.

14
Tubes and Hybrids / Traynor YGM Tone Stack
« on: July 30, 2015, 05:19:22 AM »
I have a Traynor YGM amp that has a Baxandall tone stack, which seems to be great for clean tones. I would like to change this feature as it is way too fizzy when it breaks up. What type of tone stack would give the YGM3 a "darker" tone? This is the YGM-4 version with (4) eight inch speakers.

15
Amplifier Discussion / Re: "Where's Roly?"
« on: July 30, 2015, 05:00:44 AM »
Thank you for your help, as you see I am a newbie, yet you are very helpful.

(1)"Keep on sowing your seed, for you never know which will grow -- perhaps it all will."

(2)“Energy cannot be created or destroyed, it can only be changed from one form to another.”

                                                          Albert Einstein
 

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