Blog Pages

7/15/14

VACUUM TUBE BREAD BOARD ADAPTERS

Prototyping with vacuum tubes is always challenging. So, a while back I designed  a few simple adapters to make it easier to prototype tube circuits with standard electronics bread boards.

Make sure to use a high quality bread board with these and don't go too crazy with the voltage levels. Also, pay attention to the heater current because it can be a few amps with larger tubes!

BB-X7 TUBE ADAPTERS


BB-X7 tube adapters are specifically designed for 12ax7 tubes. All tube elements are marked on the PCB for easy identification. Of course, they work equally as well with 12AT7, 12AU7 and 12AY7 tubes. These things make it a breeze to prototype 12AX7 preamplifier designs. Of course, high voltage precautions should always be followed when using these little gems.

BB-84 TUBE ADAPTERS


BB-84 tube adapters were designed specifically for EL84 power pentode tubes. All tube elements are marked on the PCB for easy identification. Now those single ended and push-pull power stages are much easier to design. Once again, always follow proper high voltage precautions when in use.

BB-OCTAL TUBE ADAPTERS


BB-Octal vacuum tube adapters were designed for a 6SN7 preamplifier I was working on at the time.
They can, however, be used for power amplifier designs if you pay very close attention to how you hook up the heater current. Also, extreme care must be exercised when using high voltage power tubes.

BB-NOVAL TUBE ADAPTERS


I love the EF86 pentode tube. So, I designed the BB-Noval adapters for tubes that do not follow the 12AX7 pin-out. All of the vacuum tube pin numbers are identified on the PCB for easy hook-up. Now all of those class-A pentode preamplifier designs can come to life much faster. As always, good high voltage design practice should be followed during use.

UPDATE 6-15-2017

These are now available again on EBay at these links:

BBX7 - specifically for 12AX7 type tubes
BB84 - Specifically for EL84 Pentodes
BBNOVAL - For almost any 9 pin noval tube
BBOCTAL - For 8 pin tubes such as the 6SN7

They are cheaper if you get them directly from me.
Just contact me by commenting here or on my web page at trentonblizzard.com.


Thanks for reading,
Trenton

7/13/14

PULTEC EQ INDUCTORS

Finally! The Pultec EQ inductors and transformers have arrived. I now feel like I have made a little more progress on this project. I really cant wait to get this thing going!

I will be sure to keep you posted as things progress. So please stay tuned.
Thanks for reading,
Trenton