JE Labs

Spalding 3 speed A Japanese folding bike that resembles a Raleigh 20.   The Shimano 3 speed internal gear hub that came with it ha...

Most of my knowledge in Audio DIY have been gleaned from the Radiotron 3rd Edition. The 4th Edition is just over the top of my head, bu...

Sample some of the articles at Enjoy the Music!  Contact Joe Roberts on eBay for Archive CDs

Type 77 pentode in the  Radiotron SE2A3 amp Plug-in compatible with the 6C6 

© 1934 All the tubes I am using in my Hi-Fi System were being manufactured by the time the RC-12 was published. RCA phono from RC...

A few updates to the Jensen Ultraflex Revised crossover + EQ/HF boost   The fixed resistor attenuator was inspired by the Jensen...

I've been feeling nostalgic lately especially after unearthing a box of prints and negatives which I've been scanning and uploa...

It's been many years since I listened to 2 cubic foot slanted front boxes loaded with 755s. The 755E was chosen because I have had ...

I have been a happy user since October 2013 ;)

The  Altec N1600C   series crossover  has been a significant constituent in the evolution of my  Altec 2-way  horn speaker system....

Truth be told, I was never fully satisfied with the performance of the Altec 2-way which is why I never uploaded the old article in the  A...