Blocker capacitors for tube amp !!! (Made in USA).

[@Dallas-Rife-UDX-347-Tennessee]

Good to go 👍. Top quality building with the best parts for the best sound , gotta have it . Keep up the good work

[@tonywilliamitis2421]

I was proud of my little doorknob caps. Feelings of inadequacy are setting in. Great video! Very informative.

[@NeedleBender785]

Thanks!

[@757boulderbuilt4]

I love HEC capacitors, it's all I use when available. Not only do they have the best specs, there more compact than most. I love a part that you can see and feel the quality as well. Thanks for locking in a commercial account 😎

[@NeedleBender785]

Thanks!

[@audiosmith3811]

That’s the real deal rite there for sure. Good caps I assure you.

[@NeedleBender785]

Thanks!

[@robertmeyer4744]

Them caps look real nice ! The ones in a MW or AM transmitter are much bigger. Longer wavelength . and high RF amps. But that 50KW . Normally I work with 8877 and 3-500Z with 572/B style amps. Them blockers are easy to find, I have Murata ones and they hold up . also some Russian ones. But that in the 1.5 KW and under amps. Them blockers in SB 220 and SB 200 known to go bad. more so the red ones . They get moisture in them and they flash over . Any time I come across them ,I swap them out. They known to fail over time. BBI has a bubble gum test for them. I got the green ones in my SB 200 and they still good. Normally a plate blocker cap has DC ground in one side and plate DC volts on outher and the RF volts and RF amps. It is a hard working cap. They can do a lot of damage to amp when they fail . As they fail High Level RF can arc all around and could flash the tube. 73

[@NeedleBender785]

Thanks for your input!

[@jlyles9104]

I used HEC HT59 as screen bypasses for my TH555A PA at work. I think I have 14 of them around the big tube sockets, two tube push pull 200 kW pulsed tubes at 2.8 MHz. They are paralleled with Kapton film bypasses, built into the Thales sockets for HF through VHF. For plate blockers I had HEC make custom very low inductance ceramic caps. About 6 inch diameter and 3/4 inch thick, they have a metal ring on both sides for contacts, and a wide copper strap is attacked with a lot of machine screws. The plate voltge is 15 kV DC. It's good that plate blockers don't have high RF voltage across them if properly sized to have low Xc. Then they only have to support holding off the DC with a small amount of RF ripple voltage across them. They do have to handle the RF current out of the plate into the first element of matching.