JCA 50H - 100H - 100HDM    Mainboard mod "Dirty Smile V1.2"

The original pcb will be exchanged for a completely new pcb.

You have three channels:
1. Dirty Smile
2. Very Dirty Smile
3. Bell Clean

Here are some short Demo from Philipp Frank - Thank you!!!

Here some pic of the board:


The foot switch PCB.

You got a lot of options to swtich your sound to perfection
Saturation, Gain Structure, Fat-Low, Bright-Normal, Voice.....

Price for one main PCB and one foot switch PCB:
139€ + shipping

Please order here!
Important! There are no more PCBs in stock! I won't have PCBs made again until I have at least ten orders. You can be entered on the order list.

After ordering via email you will get an invoice with a PayPal link.
After the payment i send the schematic and the assembly drawing by email.


I assume that someone working on tube amplifiers is aware of the dangers of high voltages.
I am not liable for damages caused by the use of my products. Any form ofliability is excluded.

JCA20H with 6L6 tubes

JCA20H  original  schematic


If you want to donate me via Paypal click here