Metropoulos Forum

To am_I_evil

Have you got the Layout for the SLO please?? Or somebody on this post...
I'm starting to build a SLO clone and i started with only the parts list so i need the Layout and it's really hard to find it on the web!!!
It will be very kind if you or somebody else will send it to me!!!
Thanks.

Register yourself on the http://www.slocloneforums.com

Lot of knowledge there on the soldano's and amp building in general, same as this forum is for marshalls.

Hi, I almost finished my SLO and fix some issues with hum (just a few cosmetical work has to be done). Now it sounds great, and I love it















More pictures on
http://www.ampspecs.com/myamps.php

Are these 1/4 watt resistors? On plates you've used them too?

Hi, no 1/4 watt resistors are to weak, these are 0,6W.

I know that they are too weak, but on your pictures they look so small... Asked to be sure

Project completed! Now it's time for












All pictures on http://www.ampspecs.com

Hello,

Project uncompleted....

I was so unhappy with my amp that I decided to start build from beginning. Reason for that is because debugging and modifying caused such a mess in my amp that i couldn't watch it...

And after I finish it once again, I believe it sounds better than before, but there is still something wrong with it. There is a huge hum or his. I tried to play it but it is so annoying that is not playable...

- All input jack are isolated from chassis
- I tried to make build clean as possible
- I also add choke on the outside of the chassis
- I change resistors on preamp tubes to metal film 2w resistors to avoid hiss
- Neutral green is grounded at chassis by itself
- heater CT (2 100 ohm resistors) grounded at power board.
- Power board, OT, CT(400m) are grounded together at pt lug.
- I cut all wires from PT that I don't need.
- I make all connection wires short as possible
- I also change the preamp tubes.

I really don't know what else to do..., but overall ...It sounds good,if only I could make it quitter...

Video:
https://youtu.be/oftI3Bt4vk8

Update:

- I connected two 100 ohms resistors to different pt lug, it doesn't make any difference, so I put it back to power board.

I connected output jack directly to chassis and cut wire to pt lug(I think there is a little difference, but it is worst) so I isolated it from chassis and connect back to pt lug.

- I connected footswitch jack directly to chassis without isolation and this "brum" dissapears, but now is doing SSsssSSSSssss. Before I've done this it was "broum" on all channels and it was unacceptable. Now clean is ok, crunch is a little bit worst and overdrive is not ok. This ssSSSSss increases with gain and volume.

Any idea what else to do?

Without a scope it will be very hard to find. If there is a chance that you could borrow one for tests?

If not...
There is a Difference betwin HISS and HUM. Hum is more likely to be the problem with filtering, but hiss can be caused by a small resistor that is very hot and it some where in the signal chain, or a plate resistor or even part of a B+. Cathode resistor of the CF should be same wattage like a plate resistors, for example... Bad grounding can cause that hiss too.
Is this noise is part of the Power Amp or a Pre-amp?

Hello
I apologise for late reply! I found the issue in my amp and fix it I mounted footswitch jack directly to chassis, and hum almost disappeared, after that I add chassis into the head isolated with aluminium. The amp is now really quiet, more quiet than my EVH 50W head.

I also made two modifications:
- fotswitchable solo boost
one alpha 250k "solo volume" pot and relay, which switches from master volume to solo volume. (it works great, without any pops, and the tone stays is the same)

- Footswitchable fx-loop
I add one relay which disconnect fx-loop.

I also extended footswitch, now it has three switches (channel/solo/fx-loop), and is connected to 9V(this is for relays).

I will also make video and share it with you guys!

Thank for all the help!

Uros

Hi Am I Evil, congratulations for you amp. I'm italian and now I'm ordering InMADout transformers. I've already used InMadout transformers fiew times for Marshall clone build and they works great! But now I've decided to use then for slo 100 clone. In your opinion, how do they work? Could you post a youtube video about your finished amp? Did you know about tranformers comparison between InMadout-Ig-Hammond-Conetics?

Anyone got a layout of the SLO 100 watt?