Help and Getting Started

ALL, I am here because my brother and I were in the process of building a ODS but decided to use a quad of EL84s instead of 34s. Well my brother has since passed away from colon cancer in Augest '25. He was going to build his own eyelet boards and engineer this whole project. Then I found this site with the boards and layout and thought I could probably do this....? We had already purchased the transformers and chasis, Hammond 370FX and 1750G. I really hope if someone could just chime in with some "definite changes" I will need to make to get this thing to function with 4xEL84s. I just purchased a Hammond 194E choke (VoxAC30 30H 100ma). I'm thinking that might have been a wrong move. According to Google A.I. it was.... This is really a big undertaking for me.But thought it would be a huge learni…

I've noticed a discrepancy in three of the resistors listed on the BOM for the Dumble builds, when compared to the layout and schematic. R24 is shown as 1 watt in the BOM but 2 watts on the schematic and layout. R25 and R26 are shown as 2 watt on the BOM but 3 watts in the layout and schematic.

Can anyone help with any ideas why they would stop working?

Thank you, Bill D.

Hi,

Is some one familiar with the hum for the Vibrato / Trem on F.ender Reverb PCB 4.0.

I have a hum when i switch the Trem on. Reverb is clean and quiet, amp is hum free and quiet.

It s a loud hum when i switch, with a 2 button switch the Vib on.

If this sounds familiar to you, please let me know. Suggestions, Tips let me know. Thnx in advance. Henri