Hagerman Technology

08/27/2026

https://www.hagamps.com/products/tubifier-tube-buffer

Have to launch this a few days early as I will be on vacation for the next 2 weeks. I can ship out a bunch tomorrow, but then normal shipping starts on the 10th. Enjoy!

TUBIFIER is an always-on vacuum tube buffer providing warmth and tonal enhancement, ideally positioned at start of pedal chain. It employs a vintage NOS Raytheon 6088 pentode originally designed for battery powered hearing aids and portable radios. This pedal will give your solid-state or digital ri...

08/18/2026

Filming Episode 10...

08/18/2026

Oh my, the premium lead-free solder I use just went up to $267 a spool (1lb)...

08/13/2026

New versions of GAMMA RADIATION and NEOKLON are now available! I redesigned them to have real k***s. Same circuit, same tone.

I still have a few of the old orange style pedals in stock, which you can select as well (only $99).

https://www.hagamps.com/products/gamma-radiation-transistor-distortion-pedal-kit

08/11/2026

TUBIFIER - available on September 1...

08/07/2026

I will be launching my new TUBIFIER pedal with a discounted price of $99 for the entire month of September.

Perfect for warming up the tone of your solid-state or digital rig. Great for bass players as well.

Stay tuned...

07/24/2026

A friend bought a used Carvin XB100, but thought something was off. So I checked it out. Amp was in great shape, but sure enough, bias switch was in wrong position (not set to EL34). That pushed it deep into class B. Easy fix.

Photo shows it running at 8 watts and 1% distortion. Everything seemed fine, but when treble was pushed amp would go unstable. This was into an 8 ohm resistive load. Maybe the speaker jack wasn't very tight? With presence set to zero and brightness off, it played well.

Checking inside I noticed feedback capacitor C55 was not installed. Intentional? So I put one in. Didn't really help much, as amp would still go unstable when pushed at high frequencies. Thinking about it now, I should have tried a capacitor 10x larger, which is exactly how I tamed the POWER BABY feedback loop...

07/23/2026

New PCB mechanics to fit into updated 2, 3, and 4-knob enclosures. Of course, all hand-built using through-hole parts...

FUZZ
NEOKLON
GAMMA RADIATION

07/14/2026

Final design, out for test...

07/08/2026

Always trying to improve things, this time updating mechanics allowing for larger k***s on these two pedals. Everyone complained about the tiny k***s! I get it. The designs were originally built as kits (akin to the NOTAKLON) and the knob-less pots came in handy to make things easier to assemble.

Anyhow, making it happen. New mechanics, new circuit boards, one more round of prototypes. With luck I can get these into production by Labor Day...