dragonbat13 wrote:
Looking at the chassis there is a center punched hole for a rectifier tube. I could use that, and move the bias pot to get four tubes in. That wouldnt be bad. As far as the PT, it may take some grinding and drilling, but not much.
Actually, that's intended as the IEC plug chassis ground termination point. FYI, a larger PT is going to present some problems; first you are going to have to enlarge the chassis endbell cutout or just remove the endbell and then be prepared to shift your power and main board mounting screw locations.
The last PT that I had Heyboer custom wind for this chassis was basically a Fender Twin transformer built in the Vibrolux PT footprint. Now that would be overkill for you, but something a long these lines would support a quad of 6V6's or a pair of 6L6's as well.
I am thinking the 40-18029. That ones 355-0-355 at 200 ma.
Tony you stated that the JJ 6v6 will handle 450 with ease. Are you talking about plate voltage? I havent looked into tube amp building in awhile but I dont think that the bassman iron will put out that much, unless I am forgetting something from long ago.
Soo IMO in going with the larger 50w iron you are actually heading more in the direction Dumble designed the amp's performance specs, so it will feel and sound more like a Dumble amp should IMO.. If you've played a D-lite with the smaller transformers and like it then by all means Vibrolux away..If you've played an actual 100w Dumble ODS style and like it but want a lower powered 6v version go with the transformers I recommend don't worry about saturation and regulation and feel the punch..
Tony
Ditto, I never even bothered with the dual 6V6 setup, right from the jump I went with a maxed out 50W OT and around 465V on a pair of 6L6's.
I am thinking the 40-18029. That ones 355-0-355 at 200 ma.
Tony you stated that the JJ 6v6 will handle 450 with ease. Are you talking about plate voltage? I havent looked into tube amp building in awhile but I dont think that the bassman iron will put out that much, unless I am forgetting something from long ago.
IMHO, the PT current rating is too small for a quad of 6V6's
Ok, I have been searching for awhile and so far it seems that to find something adequate for a quad of 6v6's its gonna be alot of searching.
But before I go through all that I just have one question. I dont really NEED the extra power, or should I say volume. I am quite confident of that anything over 30 watts would be overkill. I live in a trailer park and I never really play anywhere besides at home.
So couldnt I limit myself to two 6v6, but have a overkill transformer set like the ones listed above with the lesser current capacity?
I know I need to figure out exactly how much current I would need so I am also going to figure out that with more precision. I am just wondering if the output section would still have enough headroom on two 6v6 with adequate iron.
One reason I want to go with 6v6 tubes is that I have enough of 6l6 based stuff, there is very little on the market with 6v6 tubes that dont cost stupid prices, And I really want to stick to them.
dragonbat13 wrote:
One reason I want to go with 6v6 tubes is that I have enough of 6l6 based stuff, there is very little on the market with 6v6 tubes that dont cost stupid prices, And I really want to stick to them
So, just get the MCI equivalent to a Fender 022723 and then just find a dual 6V6 compatible OT then. I would try the TW 6.6K 4/8/16 OT (40-18064) and call it a day.
Go to Normster's post in this thread a few entries down and there is a BOM which will get you most parts.
I think it's the 1.5 variation but it's an excellent guide. https://tubeamparchive.com/viewtopic.ph ... ght=hybrid
Normally when someone puts up a recommendation on a build I usually automatically assume they are actually using an amp in a band setting, not using it in trailer.. Perhaps I should ask this first before actually recommending something.. Although I think my previos post still applies to achieving a more ODS Dumble like feel and tone.. I can see where one wouldn't want to go through all the trouble of grinding and drilling a chassis to add the extra power if they are just using it at home in a bedroom as a practice amp..
On the flip side.. The really cool thing about setting it up as a 4 4V style amp with my transformers is at any time if you do decide to take it out in a band type setting you can set it up for 4 or 2 6V's or 6L's or even 2 EL 34's..
It's good that you look at all your options and take in a few opinions.. You know what's best for you and ultimately choose the right set up..
Yes the JJ's will handle up to 500V on the plates..
Good Luck and hope I didn't confuse you even more..
Tony
" The psychics on my bench is the same as Dumble'"
After looking at everything I think I will try the last recommendation of a TW output with the vibrolux and two 6v6.
That way the chassis will pretty much be left alone except for a couple of OT holes. Then if I decide to upgrade later on I can always keep the Iron and go with something else. I am sure that most builders wouldnt mind having that setup on the shelf to build something with someday. It wouldnt be a total loss.
Thanks for the build of materials. Thats gonna help out a lot.
As far as the true ODS tone, I can fully understand that some of the tone simply comes from the volume and power. It makes me think of how my twin is considered a "ultimate clean" amp. But for those who can stand a full blast twin, this isnt the total truth. A full throttle twin is not a machine to be denied of its overdrive tonal qualities. There is no "clean" anywhere around when cranked. My point is that raw power has alot to do with tone as much as anything else.
Anyway, thanks for all your time and help deciding where to start.
Last edited by dragonbat13 on Sat Aug 04, 2012 11:46 pm, edited 1 time in total.
Good luck.. If you go with the Vibro power make sure you get plenty of distance between that an the OPT as those PT's generate a rather large field.. I would give id at least 2"
As far as the true ODS tone, I can fully understand that some of the tone simply comes from the volume and power. It makes me think of how my twin is considered a "ultimate clean" amp. But for those who can stand a full blast twin, this isnt the total truth. A full throttle twin is not a machine to be denied of its overdrive tonal qualities. There is no "clean" anywhere around when cranked. My point is that raw power has alot to do with tone as much as anything else.
Even when driving a car at 20 mph, a V8 will feel and respond differently than that of a 4 cylinder.. Same type of comparison can be said for output sections in an Overdrive Special..I think!! Horsepower/Current
Tony
" The psychics on my bench is the same as Dumble'"
dragonbat13, just my 2cents, but Tony's The Man.
I have built a D'Lite with Bassman OPT, usable as 2 or 4 6V6 switchable, or rebias and 2 6L6. Lotta flexibilty in a small package.
Good luck.. If you go with the Vibro power make sure you get plenty of distance between that an the OPT as those PT's generate a rather large field.. I would give id at least 2"
I am interested in this point. How does one decide on the distance/ orientation of the PTand OPT ?
Good luck.. If you go with the Vibro power make sure you get plenty of distance between that an the OPT as those PT's generate a rather large field.. I would give id at least 2"
Tony
That TW OT has about the same footprint as the larger OT that Moss was using in the 44W D'lite. The mounting centers for the smaller two point mounted OT(35W) in that chassis is 4.125" away from outer PT centers, so he has plenty of room. Actually on that chassis there's enough room to mount a choke in between the two as how the 44W D'lites were setup.
I built a D'lite 44 (2x 6L6) from a kit supplied from Brown Note back in 2007.
I am old school so I didn't think a 6V6 amp would have the balls I wanted int a amp, so I chose to go with the 6L6.
The amp came with a dual primary OT that enabled me to run either 6V6 or 6L6 tubes.
I never ran the 6V6 in this amp.
Brown Note had trouble delivering things and I'm not sure if they are even around anymore.
That being said, it was my first tube amp build and it turned out well.
I did a lot of tweaking on that amp and learned a bunch.
I ended up buying a Fender Prosonic 50w output transformer from Angela.
It works great and has good tone.
I eventually turned my amp more towards Dumble specs and got it sounding very Dumbly.
I think maybe you are confusing the Bias Pot hole for a rectifier hole or something.
I have the assembly guide if you can't find it online plus a bunch of other stuff.
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