Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: triode on May 03, 2011, 06:20:45 pm
-
Had a customer commission me to build a Dumble serial #124. Normally I would not, but I know this customer, so I went ahead and did it.
Of course, I could not go ahead and purchase one of those dumble eyelet boards, no no, I had to "Hoffmanize" it. So I did the layout in
Doug style on the main board, and then put the power supply board, low voltage supply board and fet board on 1/8" g4 also. I will admit,
this amp sounds nice. Maybe I will mod it up and offer them for sale, but I wanted to know if there would be any demand for me to offer up turret boards and
a layout diagram for the main board, fet board and low voltage boards. I would just purchase the actual relay boards from a PCB house (unless doug sells them for this relay), as it is a lot easier.
Anyone interested? Should I take this to another subtopic? Here is a pic of one that is mostly done. Normally I would put the 22uf caps on a
board also, but this was the first one and I wanted to keep the top clean. With two output tubes (50W) the power tranny is smaller and you can stick them all on a board (yes, I went ahead and made a 50W to keep around the house).
-
Very very impressive! That looks great.
With respect, Tubenit
-
Beautiful work! Budget permitting, I would be interested.
-
I'm sorry, but there is no way in heck that amp will sound right. You need to shape and hone the sonic characteristics inherent to the subtleties of the waveform for each set of unique yet complex tonal qualities. The ONLY way to accomplish this monumental task is to apply about a 1/4lb of JB Weld to your turret board. Oh, and be sure your chassis can take the extra weight.
Beautiful build! :worthy1:
Jim
-
Beautiful work! Budget permitting, I would be interested.
Very very impressive! That looks great.
With respect, Tubenit
Ditto!
-
That is awesome. I would be interested.
-
Dumble... Dumble, Dumble!!! There I said it... Don't understand the problem. My enders are all so cool too.
Nice work.
-
nice
which one is that?
-
Ops, that is a 100W over drive special (ODS). There is a switch to go 50W (takes two tubes off), but
it is impractical (tone barely changes, sound level really does not change much, recall our logarithmic
hearing). I think in the future I would only build 50W versions.
-
If you made conventional boards rather than the hoffman layout i would be interested.I have built several now but I put my power supply,filters and relay supply all on one board with a standup PT so there is lots of room.
-
Nice looking build, triode. I like the layout of your build.
-
If you made conventional boards rather than the hoffman layout i would be interested.I have built several now but I put my power supply,filters and relay supply all on one board with a standup PT so there is lots of room.
Hrm, I actually built a board that has almost all of it on one board... but alas, I had a brand new Z axis mount power tranny for this project, and the used tranny for the 50W was Z axis also. The standup is really the way to go with this amp, I think. Again, I have a board with the circuit, HT power supply and relay power supply all in one, but I did not use it on these first two.
-
Pretty cool. Conventional wisdom in the d-clone world is to copy the HAD layout in every detail. You and I may be the only ones in the world to go their own way (well, Bluesmeister is a different layout, but it I don't consider it a clone, as such). Yours is much prettier
(http://i214.photobucket.com/albums/cc253/vision83/resizedampwiringforpb.jpg)
-
Does it sound as good as it looks? :worthy1: Any clips?
-
I need to get some sound samples (if you are asking me and not pullshocks). Here is a pic of the
50W version, finished. It has a vintage power tranny, just ignore that :)
-
Great job Triode.
You sure wind those wires together tightly. Very neat.
Regards,
Al
-
Triode does the twist! :laugh:
Great job!!!