100w Scumback M75 demo: LP into Marshall modded Traynor

[Gamedojo]

Just got this speaker friday. I wanted to check out if I liked the H55 or the M75 better. I think I dig the midrange tones of the M75, so its a keeper. But don't hold me to it! All of scumback speakers are top notch!

http://tylergrund.com/mp3/traynor_m75.mp3

Any scratchyness you hear is coming from the PPIV master being down pretty low. Not the speaker's fault. Sure with I could get my UA to work with my Traynor!!

...and a quick lower gain one when my wife came in and told me to turn down...even lower then I already was! HA!

http://tylergrund.com/mp3/traynor_m75_lowergain.mp3

[novosibir]

Guys, please start your new topics in the concerning forums!
This here doesn't belong in the 50W forum
As well as your bicycle doesn't belong in your sleeping room!
Therefore moved here.

Larry

[Kevin]

Nice clips! Traynors kick ass. What exactly did you do to yours? Any gutshots? And how come the UA won't work with it?

I'm using M75s with mine, but I would like to try some H75s. Any clips with the H55s?

[Gamedojo]

Nice clips! Traynors kick ass. What exactly did you do to yours? Any gutshots? And how come the UA won't work with it?

I'm using M75s with mine, but I would like to try some H75s. Any clips with the H55s?

Its converted to Marshall Bass/Superbass specs. Don't have any gut shots, but these traynor's are not very pretty inside:) Whats nice, though, is they come fully decked out with real mustard caps.

THe 8ohm Traynor Transformer caused an arc on my tube socket and blew out tubes when running it into the 30ohm in of the UA. I plan on buying a Marstran transformer, when they get more stock in, and hook it up to the 16ohm tap. Until then, I'll live with the PPIV.

I have an H75 paired with the M75. Highly recommend. Not sure if I like the H75/H55 or H75/M75 combo better...but I do know I like the M75 by itself MUCH better then the H55. H55s are very scooped sounding and I really thought it sounded sorta harsh on its own.

Sorry, no clips of anything other then the M75 for now. I should take the time to do an H75 clip though. Stay tuned;)

[Kevin]

An H75 clip similar to that first one would be much appreciated.

I have a '72 YBA-1. I cleaned up the wiring, replaced the filter caps and tweaked the circuit a little.

I don't know much about the UA, but you could try running another load in parallel to it - just some high-wattage resistors to give that OT something that it likes a little more.

OT replacement has been discussed a bit at the plexipalace forum. Scroll down to Parkhead's post on this page: http://www.vintageamps.com/plexiboard/v ... f.#p466921" onclick="window.open(this.href);return false;

He compares pulling an old Hammond to pulling a PAF to replace it with a current clone. The old Hammonds do sound quite different from Drakes, and I guess if you want it to sound like a Marshall... Send me a PM if you swap trannies and want to sell the OT.

[deepcove]

THe 8ohm Traynor Transformer caused an arc on my tube socket and blew out tubes when running it into the 30ohm in of the UA. I plan on buying a Marstran transformer, when they get more stock in, and hook it up to the 16ohm tap. Until then, I'll live with the PPIV.

I find this really intriguing. I was running my 1968 YBA-1 with a UA for a while and now my Traynor has lost it's "Magic". It is not as open sounding and periodically the volume jumps up and the magic is back then it dissapears. I have tried replaceing the tubes to no avail.

Is there a chance that I have damaged my OT?

[Gamedojo]

I'll see what I can do with the recording! Maybe tommorow evening.

Apprently HO's design can be made in a lower OHM then 30, but he says it sacrifices the effect of the UA...

My concept of replacing the tranny is two fold. FIrst and formost is simply to save the original from disaster. Two would be the more Marshall correct sounding tranny. I DO like the traynors sound. This situation is going to simply create a reason to swap them out and give it a try. I actually think the traynor tranny might be superior to Marshall Iron, I just simply can't use it with the UA. So... if the UA and the Marstran sound better then theTraynor Iron and a PPIV...it stays. Otherwise. Traynor Iron goes back in, and UA goes on eBay;)

I probably will hold onto the transformer, but thanks for the offer. I'm really into amp mods and building, and can definitely find a use for such a killer tranny. Can someone say trainwreck?!

An H75 clip similar to that first one would be much appreciated.

I have a '72 YBA-1. I cleaned up the wiring, replaced the filter caps and tweaked the circuit a little.

I don't know much about the UA, but you could try running another load in parallel to it - just some high-wattage resistors to give that OT something that it likes a little more.

OT replacement has been discussed a bit at the plexipalace forum. Scroll down to Parkhead's post on this page: http://www.vintageamps.com/plexiboard/v ... f.#p466921" onclick="window.open(this.href);return false;

He compares pulling an old Hammond to pulling a PAF to replace it with a current clone. The old Hammonds do sound quite different from Drakes, and I guess if you want it to sound like a Marshall... Send me a PM if you swap trannies and want to sell the OT.

[Gamedojo]

THe 8ohm Traynor Transformer caused an arc on my tube socket and blew out tubes when running it into the 30ohm in of the UA. I plan on buying a Marstran transformer, when they get more stock in, and hook it up to the 16ohm tap. Until then, I'll live with the PPIV.

I find this really intriguing. I was running my 1968 YBA-1 with a UA for a while and now my Traynor has lost it's "Magic". It is not as open sounding and periodically the volume jumps up and the magic is back then it dissapears. I have tried replaceing the tubes to no avail.

Is there a chance that I have damaged my OT?

I'd say its possible. But I have no way of knowing on this end. It sounds like its possibly has a small internal short. Just enough to damage the output from reaching its peak. Not really sure.

But... these traynor OT have a 3600 ohm resistance at a normal 8ohm tap. So its a little rougher on them vs. normal marshall transformers (at roughly 3400) and I think they are more sensitive to the missmatch.

4:1, I think, is proving to be too much of a missmatch for the UA. 16ohm seems to be the only way.

[razelfrax]

Bassmasters are getting more expensive now and they have limited OTs. But early voicemasters have lots of eyelet board room and Ots with switchable 4 , 8 , and 16 ohm taps and you can get them cheaper! lol Ive built up 3 now.

[mayrandp]

Nice clips Gamedojo! Do you have a YBA-1 Bass Master or a YBA-1A Bass Master Mk II? I can't really tell from the pic but to my ears it sounds more like a YBA-1A?

I have a '71 YBA-1 and a '72 YBA-1A both in stock form. I'm on the fence to whether I keep them stock or mod one them to Marshall specs. To be honest, I never had the chance to try a good 50w plexi (I've just heard some live or from recordings) so I don't really know what to expect if I mod one.

I'm also using Scumback speakers and I'm very pleased with them. I'm using a M75/H55 mix. Like the M75 by itself and for recording/mic'ing. Like the H55 not so much for mic'ing but mixed with other speakers it makes my cabs, whether a 2x12 or 4x12, sound bigger.

Here's some modest recordings that I did using my '71 YBA-1 and Scumback speakers (used the M75 for mic'ing). Did this just for fun during some spare time (for more details, scroll down to the 'About the song' section):

'71 YBA-1 clip 1
'71 YBA-1 clip 2

Here's a clip with a late 60's Traynor YSR-1 recorded live in the room with a little Edirol R-09:

YSR-1

[Gamedojo]

I'd love to hear your amp without the boost in front. Your clips sound really good. And to be honest, it sounds like you may not need to change the amp at all. You're already getting lots of the tones a Marshall gets. Though, I found my mods to be an improvement over the stock YBA-1a that I had. In my limited experience the stock Traynor fights to stay clean throughout, and the fighting makes it a bit less inspiring to play. The Marshall mods softened the attack (feel wise, not tone) and made the amp breakup easier.

[mayrandp]

BTW, just to be clear, in the YBA-1 clips I'm only playing the lead guitar (rhythm guitar is David Grissom and he's using a '71 Marshall 20w head into a '69 4x12 cab).

I'll try to record some clips straight into the amp. But without the boost, I find it's a bit too clean for certain circumstances (although I also find that I boosted too much, especially for the '71 YBA-1 clip 2).

Softened attack and easier breakup, might be just what I'm looking to improve. My YBA-1A sounds cleaner compared to my YBA-1 but personally I prefer the tone of YBA-1A.

[Gamedojo]

...I'll try to record some clips straight into the amp. But without the boost, I find it's a bit too clean for certain circumstances (although I also find that I boosted too much, especially for the '71 YBA-1 clip 2)...

Yup, exact reason I ended up plunging in and modding the amp. Its one of those situations where I really really love the sound of an amp, but in its current form, its practically useless for my needs. THe Hiwatt comparisons are pretty correct. Its an amp that would really fit a specific Niche pretty well, but I'm not a big fan of pedals and ultra-clean big sounds are not what I'm after.

[mayrandp]

I did a quick and raw clip straight into the amp, no clean boost used:

'71 YBA clip 3

I'm fighting the amp a bit more. Also, it's not the same cab as the previous clips (this cab has Scumbacks M75/H55 65w instead of the lower wattage) plus probably different mic placement too.

[Gamedojo]

Can you bump yourself up higher in the mix? The sound is hiding behind the rhythm and drums. Very hard to get a good feel of how the amp sounds.

BTW, whats your experience between the higher and lower wattage speakers. I only have the 100w versions (since these traynors can put out something like 90 watts!)

I did a quick and raw clip straight into the amp, no clean boost used:

'71 YBA clip 3

I'm fighting the amp a bit more. Also, it's not the same cab as the previous clips (this cab has Scumbacks M75/H55 65w instead of the lower wattage) plus probably different mic placement too.