El34 world logo

Back to Library PAGE
Page 1 - Page 2 - Page 3 - Page 4 - Page 5
Relay install tips for the 14 pin Relay and sockets
-
This is the schematic for the 14 pin socket -  small signal switching relay's that I no longer stock.
-
This is a relay power power supply board.
The white wires are the 6.3 vac coming from the amps heater supply.
To relay coil +
goes to the relay coil positive.
The relay coil minus is what you ground with a switch to turn the relay on.
I used 4700uf/25V caps because that's what I had on hand.
I stock 4700uf/16Volt caps to use on these relay power supplies.
-
This is the schematic for the 14 pin relay that I no longer stock.
The power supply board is shown above.
I have two 4700/16V filter cap and I have them separated by a 180 ohm 1/2 watt resistor.
The 180 ohm resistor drops the supply voltage to the relay down close to 5 volts.
Without out it I was closer to 7 volts.
You can adjust the value of this resistor to suit your particular amp.



image
image

Home - Ordering Information - Returning parts - Hoffman Board manufacturers
Links - Shipping Info/policy - E-mail Me - Amplifier Service Technicians - About HoffmanAmps

The Tube amp Library of information
Click the link above for Tube amp info, Schematics, Board building information, Projects, Mods, Transformer diagrams, Photo's, Sound clips.
There are hundreds of pages of Tube amp information on my library page.
Check out our huge library of Tube Amp Schematics here

Please visit my Tube Amplifier Forum
Here's the place you can go to ask tube amplifier questions.
You will find a large community of friendly amp builders at the link above.

@ MEMBER OF PROJECT HONEY POT
Spam Harvester Protection Network
provided by Unspam
hand-mild