Belton BTDR-1H-L added to VHT Special 6 Ultra скачать в хорошем качестве

Belton BTDR-1H-L added to VHT Special 6 Ultra

I added the Belton BTDR-1HL "brick" to the VHT Ultra Special. I'll try to do another video with the amp buttoned up so you can hear the reverb better. In this video the camera was sitting on the cab (completely open back) and the mic really should've been in front of the speaker (instead of on top) to hear the changes in tone better. The VHT has a 6.2 VDC heater supply making the creation of the required 5 VDC supply very simple (the 7805 regulator usually likes a little more voltage but this works fine and provides a steady 4.9V supply for the Belton). I used the "long tank" brick which has a longer delay than the other two choices. Not shown in the video, I also ended up using both of the brick outputs connected to a 4.7k each (this was shown in one of the reference schematics). After I did this the output sounded much better to me - not sure why because output pins appeared to be internally connected (but then I don't know why there are two). In any event I recommend doing the same or at least using a 4.7k tied directly to one output before the pot. Also, in the video I mentioned having a 33k from the output pot wiper back to the preamp but it is actually 22k (this does make a difference in the reverb output volume). Also note, there is ZERO loading with the device wired in the location as described - I did an A/B with the new circuit input and then output (connected and not) and did not distinguish any change in volume - so the location in the preamp circuit is really ideal (i.e., using the tube input pin as an "active" mix point). Same as the other amp mod I performed as mentioned in the video. Lastly, the volume cut out at about 10'05" for a few seconds (you didn't miss anything really, just me supposing the distortion artifacts was probably because I had too high an input during initial tests). With the output resistors added to the brick this is now less noticeable.