Cool...Thanks fullerplast! I will go get the caps tomorrow and try this out.



Thank you bluesfendermanblues...of course, this generates more stupid questions by me....

Ayan rights...."my mod is .0047uF (4.7 nF) // 4.7Meg. I don't use it in the amp(s) with 100K plate loads, but I did use it in the amps with 220K/150K plate loads."

Questions:
1. Does the OTS use 220K/150K plate loads? Are these the 2 resistors in the latest OTS layout (May08) which are connected to pins 1 and 6 of V2?
2. Do I replace one of the caps on V2 or simply add the .0047uF cap?
3. Do I remove either the 2K2 or the 3K3 resistors in V2 and if so, which one goes....or....do I add the 4.7M resistor and if so where?
4. You could send me to hell whenever you like? 

Sorry guys...I hope to speak your language one day but for now, I may need a little hand holding so i don't destroy my amp.

thanks again!

Just tried the clean channel and it sounds fine to me. Sounds like it is only happening on the OD channel....or...thats how I am  perceiving it. I also confirmed that I do have the mods...5uF caps which replaced the 1uF in the OD channel and 2.2uF in the clean.

So, I should lower the value of that same 5uF cap next to the 2K2 resistor in V2 until I find the value that solves the problem correct?

I am definitely a newb....no shame in admitting it...

I tried looking for the details on the Gil Ayan mod in ampgarage.com but am not having much luck...a lot of posts to read through. I will keep looking...

Thanks again guys!

yes, pin8 and pin3

[/quote]
By "2,2k and 3,3k" are you referring to the resistors installed in parallel with the  bypass caps on both V1 and V2?
[/quote]

yes, pin3 and pin 8 on V1 AND pin3 and pin 8 on V2

The parts you have listed are all fine, but you still need to answer the basic question: Is your bass issue evident in both clean and OD mode ??
[/quote]

I will check that out tonight if my wife and kids give me a chance...LOL!

I did not test the clean channel but will and will update this post.

Thanks again!

+1 Yes sir...this is a better option so you dont have to modify the adapter and the 2.1 plugs are more common.

First of all...please bear in mind that I am a novice and will probably ask some stupid questions so i apologize in advance! I really appreciate all your help

Just to confirm...the cathode bypass caps are connected to V1 and V2 via pins 8 correct? My OTS should be the newer version with the Zucker mods so they both should be 4.7uF caps. I will check that tonight.

By "2,2k and 3,3k" are you referring to the resistors installed in parallel with the  bypass caps on both V1 and V2?

Here are the part numbers I found in the Mouser site for the caps:
140-XAL63V2.2-RC = 2.2uF Axial Electrolytic Capacitors 63V 20%
75-516D105M050-E3 = 1uF Axial Aluminum Electrolytic Capacitors 50volts 20%
594-2222-021-38338 =  3.3uF Miniature Axial Electrolytic Capacitors 63volts 20%

Do these look like the right part numbers I need for this mod? I figure I would get all 3 values and see which ones work best.

thanks again for the help!

Hi guys! I've been breaking in my OTS now for about a month and continue to be impressed by the variety of tones it can achieve. Today I found something that I hope I can correct. The low end sounds a little loose when playing at anything above moderately loud volumes. The OTS is stock as received from Nik, no mods done yet.

Speaker cabinet details:
I'm using a repro Fender Bandmaster piggyback style 2 x 12 cab that is loaded with Celestions...one Vintage 30 and one G12H Heritage. They are both 8 ohms and are wired to operate at 4 ohms...this is because I have a 64 Fender Bandmaster that pairs up with the cab which, as you all already probably know, runs at 4. The combination of these two speakers sounds fantastic with both the Fender and the OTS. I know the problem is not the speakers because the Bandmaster sounds very tight and focused when cranked. 

OTS settings are as follows:
Volume: 5
Bright: Down
Deep: Down
Rock/Jazz: Rock
Treble: 5
Mid: 5
Bass: 3
OD Channel Level: 5
Ratio: 3
Master: 3
Presence: 5

Just for a frame of reference...these setting nailed Robben Ford's 'Rugged Road' sound....

I noticed that when I switched to the Jazz setting, the low end kind of tightened up but the overall tone wasn't the same. I tried to adjust some settings but it lost some sustain which makes sense after reading some of the posts on that subject. Anyway, the overall sound is great but it would be nice to have the low end tightened up a bit. 

Do you guys think if I install 2 X additional 47uF, 350V caps in parallel to the 2 X 100uF, 450V from factory (Zucker Mod) that it would solve this problem? 

Maybe a mod to the Rock/Jazz circuit?

Perfect! I didn't realize he had this posted in the site....thanks!

All you need is a 2.5 mm plug. Cut the 2.1 off of the Boss adapter and solder the 2.5 on. You should be in business. 

Does anyone have a schematic for adding a passive effects loop on an 18 watt TMB EF86 amp? I ask for a passive loop because a buffered loop would probably be much more difficult to install. I've got a Kleinulator on order so I will use that. Thanks!

Wow...your situation made me call DHL....

I just got off the phone with them and they confirmed that they have not sent a bill because they are still in the process of calculating the fees?  She also said that they usually send out the bill 2 to 3 weeks after the delivery but its been a month for me. Doesn't make much sense...anyway, guess i should expect one soon.

Thanks...I received mine on 6/4 and still haven't seen a bill. 

I will keep my fingers crossed but you are absolutely right...$32 is well worth it!!!!

How long did it take after you received the amp? I still haven't seen a bill...

It took about 10 or 11 weeks to get mine as well. I received mine in 3 days from the day he sent me the shipping information so...pretty good. You're gonna love this amp...i sure do! Good luck!

Got my Overtone in 3 days from receiving the shipping info...simply AWESOME! No customs bill yet so...crossing my fingers. This thing sounds fantastic. All the hype is dead on. Hope to have some clips soon. I will update this post if I receive a customs bill.