KT-88 Non-HRM Clip

[Structo]

Don't recall if you mentioned what speakers you are using with this amp Tony?

Do you use the Dumbleator with this amp?

[talbany]

Don't recall if you mentioned what speakers you are using with this amp Tony?

Do you use the Dumbleator with this amp?

Tom
All the clips done so far were the 65's in VVT ported front Cab..I do have a nicely broken in pair of G12H 30W greenbacks I want to load and do some clips next with an HRM and Music Man see how they do.. If they sound decent I'll post em..

Tony

[AJD]

Good grief! That sounds incredible. Fantastic, unique tone and great playing. I can't remember the last time I was jealous of anything, bit I am pretty envious of that display of musicality. Great job! This may be a dumb question but exactly what Dumble-inspired amp is that with the KT-88's? What is an HRM?

[stelligan]

Cool clip. Always good to hear someone with a good grip on his wiggle stick.....

[talbany]

Good grief! That sounds incredible. Fantastic, unique tone and great playing. I can't remember the last time I was jealous of anything, bit I am pretty envious of that display of musicality. Great job! This may be a dumb question but exactly what Dumble-inspired amp is that with the KT-88's? What is an HRM?

It's not a dumb question unless I ask it,,.. To my knowledge Dumble didn't design an overdrive style amp that utilized the 88's as they were either 6L6's or El'34's used in the ODS.. the 88's was my doing.. The amp originally was a Traynor YBA 1 so the transformers are 100w but the chassis only had room for 2 power tubes I used the 88's since a pair would give me roughly 80 watts @ 500v..
HRM is an abbreviation for Hot Rubber Monkey which refers to a separate tone stack placed between the first and second gain stage of the overdrive circuit inside the amp allowing better control over the tone of the OD channel.. This also changes the character of the OD tone as well.. If you do a search of HRM here you will find all kinds of useful info on this.I personally prefer ODS amps without the HRM .. Thanks for the glowing review..
My wife holds her ears when I play and we won't discuss what the dog does..
Tony

[marcos]

Hi Tony,
there is at least one ODS that uses 6550 power tubes, #121, a 150 watts
model, one of only two built, as far as I know.Just thhought I would mention this
Marcos

[AJD]

Thanks for the response Talbany. I learn something each time I drop in here.

[greiswig]

Hi Tony,
there is at least one ODS that uses 6550 power tubes, #121, a 150 watts
model, one of only two built, as far as I know.Just thhought I would mention this
Marcos

I run my modified D'Lite with KT-88s, too, and I did try two sets of 6550s in there. I have to say, there's a really big difference in tone and feel between the two types in this amp: the 6550s feel hard and are not as musical sounding, whereas the KT-88s just seem to breathe and add a nice sheen on the high end in particular while keeping a big bottom. I wonder if Dr. D ever tried KT-88s? Or whether I just have some bad 6550s.

[talbany]

Hi Tony,
there is at least one ODS that uses 6550 power tubes, #121, a 150 watts
model, one of only two built, as far as I know.Just thhought I would mention this
Marcos

Marcos.. Thanks for the info.. You would be referring to the Todd Sharp amp as 1.. I assume?.. Correct

Tony

[talbany]

Hi Tony,
there is at least one ODS that uses 6550 power tubes, #121, a 150 watts
model, one of only two built, as far as I know.Just thhought I would mention this
Marcos

I run my modified D'Lite with KT-88s, too, and I did try two sets of 6550s in there. I have to say, there's a really big difference in tone and feel between the two types in this amp: the 6550s feel hard and are not as musical sounding, whereas the KT-88s just seem to breathe and add a nice sheen on the high end in particular while keeping a big bottom. I wonder if Dr. D ever tried KT-88s? Or whether I just have some bad 6550s.

I had similar results with the 6550's (GE's) as well.. Prefer the 88's

Tony

[mobisimo]

It's been said (by everyone), but that amp sounds awesome! Haven't been sure for a little while what sort of tone I'm chasing after and this put it back on the map in a big way. Certainly any great amp is a great amp, but I tend to prefer the character in that growl to the traditional compressed sound.

On a slightly more technical note: what brand of tubes are you using?

[Pete]

The amp originally was a Traynor YBA 1 so the transformers are 100w but the chassis only had room for 2 power tubes I used the 88's since a pair would give me roughly 80 watts @ 500v..
HRM is an abbreviation for Hot Rubber Monkey which refers to a separate tone stack placed between the first and second gain stage of the overdrive circuit inside the amp allowing better control over the tone of the OD channel.. This also changes the character of the OD tone as well..

Hey Tony, I thought the YBA1 was a 2 X EL34 amp (and later versions 2 x 6L6) so I'm not sure what you meant. Also, the HRM stack is after the 2 OD stages not unlike a Marshall.
Sorry, not meaning to pick on anyone.

[talbany]

The amp originally was a Traynor YBA 1 so the transformers are 100w but the chassis only had room for 2 power tubes I used the 88's since a pair would give me roughly 80 watts @ 500v..
HRM is an abbreviation for Hot Rubber Monkey which refers to a separate tone stack placed between the first and second gain stage of the overdrive circuit inside the amp allowing better control over the tone of the OD channel.. This also changes the character of the OD tone as well..

Hey Tony, I thought the YBA1 was a 2 X EL34 amp (and later versions 2 x 6L6) so I'm not sure what you meant. Also, the HRM stack is after the 2 OD stages not unlike a Marshall.
Sorry, not meaning to pick on anyone.

Pass me the Ensure.. Pete's right OD stack after 2nd OD gain stage.. My bad!!..
The YBA-1A Mrk 2 Bassmaster is a weird amp For some reason Pete Traynor thought he could get 90w out of a pair of 6ca7's..

http://www.traynoramps.com/products.asp ... 66&type=11

at higher voltages.. The problem was you would need roughly 800v on the plates to give you 90w into 8 ohm load but he ran them around 530 so this was giving him around 50w..Even running the 34's as a pentode is still pie in the sky..But since he spec'ed the amp out @ 90 watts, so were the Hammond transformers.. These things are huge.. The Power alone must weigh 25 lbs..It's a mystery to why he used such large iron in a 2 EL-34 3 preamp tube amp.. For the linearity I guess.. There is very little info out there on the net since Pete had these transformers made custom for him though I did call Hammond and the info they gave me was primary impedance on the OPT was 3800 into 8 ohms and was rated @ 100 watts.. No luck with the power trans although it does run cold with the 88's..Hammond did say the replacement equivilant was the 1650 series..FWIW the anode to anode impedance is for the KT88 pair at that voltage its 4000 ohms..Hope this helps

Tony

[talbany]

It's been said (by everyone), but that amp sounds awesome! Haven't been sure for a little while what sort of tone I'm chasing after and this put it back on the map in a big way. Certainly any great amp is a great amp, but I tend to prefer the character in that growl to the traditional compressed sound.

On a slightly more technical note: what brand of tubes are you using?

Power tubes are JJ KT-88 biased 55% max plate dissapation Preamp tubes are JJ-ECC 83 V1 & PI and NOS Ampherx 12ax7 in V2
The OC3 is a part of the expressive growl we like..
I am glad you like the amp..

Tony

[AJD]

Power tubes are JJ KT-88 biased 55% max plate dissapation Preamp tubes are JJ-ECC 83 V1 & PI and NOS Ampherx 12ax7 in V2
The OC3 is a part of the expressive growl we like..
I am glad you like the amp..

Tony

Love that growl. Pardon the newbyism, but what is OC3?