Jensen TORNADO 100w neo works great with OTS, here is a sound sample

I have to agree with Hywel on this one. One might improve amp’s drive tone but clean channel tone would suffer. External gadgets can improve the tone in some way but it is always better to tweak and tune just an amp to perfection. Yes, this will take time to achieve but final result would be very pleasant.
Afterwards,  obviously, you can add an external devices if you want, usually as less as possible. I fond to tiring to carry around additional rack case with C lator, effects, power conditioner (not a bad thing though), bag of additional leads, heavy cabinets etc.
Just a great amp, 1x12 Thiele cab with a built in mic and small parallel loop device with a reverb works great for me. I’m sure it will work for you too.
Listen to this clip from 3,40 and I hope you will hear what I’m talking about.



Best wishes

  Thanks Gregg for your moral support. Postage, tax and import duty to US is a big problem and main reason why we are not selling our cabinets in States.
I have several requests from there but when I explain how much it adds to actual product price nobody wants it any more.

I can’t believe that nobody is interested.
Probably I’ll list it to US market, just expensive to post.

Nice to hear from you Nik
HRM switch is a good idea!

Cheers

Yes, it will work for the OTS 50.
You have to definitely change an output transformer for a bigger one. I would change a power transformer as well, To much work though.

OTS has lovely tone and you don’t want to spoil it with an additional HRM tone stack.
Suggested mods will make amp bigger, fatter and sweeter with reduced Highs.
As more capacitance on V2 more highs will be reduced on overdrive CH.

If you still want the HRM check out layout on the Ceriatone website, dead easy to built and install little board.

Be cool.

1. Change 150k slope resistor to 68k 2watt. – bit more lower mids, compression and touch sensitivity.
2. add second 390pf capacitor to V2 tube !!!
3. Put 3 way switch on master volume with OFF, 33pf, and 64pf caps.
4. Change RATIO’s (X) feeding 150k resistor to 10k and following 0,005mf cap to 0,01mf.
5. Change MID-BOOST’s 390pf cap to 470, sweeter tone.

Hi Kev,

120pf on master makes amp to bright. It can be useful if you going to use 15’’ BASS speakers but 33pf adds just a bit highs and 66pf bit more. So it’s up to you.

When rewiring a relay use a thin two core shielded wire, connect the shield to the ground.
Alternatively check out fellow board member Plasticvonaband’s MEGA boost mod. It’s easier to install, just have to change PAB’s resistor and it adds really big boost.

Cheers

Jim,
I’ve just posted this simple mods to fellow board member Kevstar who also got the FM50 OTS. Applies to you as well.

1. Change 100k slope resistor to 68k 2watt. – bit more lower mids, compression and touch sensitivity.
2. add second 250pf capacitor to B2 tube, do not remove B1 250pf !!!
3. Put 3 way switch on master volume with OFF, 33, and 64pf caps.
4. Change RATIO’s (X) feeding 150k resistor to 10k and following 0,005mf cap to 0,01. You will thank me later.
5. Change MID-BOOST’s 390pf cap to 470, sweeter tone.
6. 12 way rotary is a very useful addition.

Now if you wish to have High gain setting on the amp operated by pedal, disconnect useless PAB relay and reconnect its one part to bypass a 220k resistor after drive trimmer, same time second part of the relay switches ON mid-boost which gives you more Mashally high gain tone. Also you can use mid-boost toggle to switch off or on mid-boost activation via pedal. In this case you won’t be able to use mid boost in normal situation, it becomes dedicated to high gain footswitch. Unless you use additional toggle switch. I’m sure good technician will do the job.
I just simply don’t have time and energy to make a drowing.

Here is a video of the amp's high gain setting (in the beginning) with a strat's neck pickup.


Best wishes.

It Is!!! and some more. You can even play heavy metal, just you have to tweak it little bit.

Let’s forget for a moment about RG-400 cable and C-lator. Let’s make amp sound great without the additional gizmos. Afterwards it will sound fantastic with them as well.
1. Change 100k slope resistor to 68k 2watt. – bit more lower mids, compression and touch sensitivity.
2. add second 250pf capacitor to B2 tube, do not remove B1 250pf !!!
3. Put 3 way switch on master volume with OFF, 33, and 64pf caps.
4. Change RATIO’s (X) feeding 150k resistor to 10k and following 0,005mf cap to 0,01. You will thank me later.
5. Change MID-BOOST’s 390pf cap to 470, sweeter tone.
6. 12 way rotary is a very useful addition.

Good luck

Hi Big,

Looks and sounds cool !

I have just relisted the Items for fixed lowest price on ebay.co.uk

http://www.ebay.co.uk/itm/260879864933?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

+1,  good idea!
Well done Fab.