Hi guys, I’m new here and need your help! Diagram for Randall Rx75rg2

[Shawng]

I’m looking for a diagram for a Randall RX75rg2 , I can’t find one anywhere, is it the same as the RG75?
What’s the difference between the RX75 and the RG75?
Thanks for any help guys.

[glebert]

I think with Randall amps like this there is usually a separate preamp and poweramp board. I know they would reuse the power amp board in several different models. You can look for the board model that is screen printed on the PCB somewhere and look for schematics that relate to that. It may be you need to use two sets of schematics, one that has the right preamp and one for the poweramp. I am working on an Randall head right now that I have never been able to find the right poweramp schematic, it is slightly different than any others but close enough to some that I could reverse engineer the difference.

[Shawng]

Thanks for the reply , that was the way I was leaning, I shall have a play and see how we fair.
Cheers
Shawn

[Shawng]

Hi guys does anyone have the circuit diagram for the Randall preamp board ID is RG75a I’m sorted with the power amp , but can’t find the preamp schematic anywere
cheers guys

[vintagekiki]

Randall RG75-A(G3) preamp (Attached File)


Reason for Editing

https://music-electronics-forum.com/forum/schematic-requests/38052-randall-rg75-g3-plus
Randall RG75 G3 Plus

https://music-electronics-forum.com/forum/amplification/guitar-amps/maintenance-troubleshooting-repair/30869-randall-rg75d-humm/page4
Randall rg75d humm

https://music-electronics-forum.com/forum/schematic-requests/45659-randall-rg75-g3
Randall RG75 G3

https://music-electronics-forum.com/forum/amplification/guitar-amps/maintenance-troubleshooting-repair/43006-randall-rg75-g3-combo-amp/page2
Randall RG75 G3 Combo amp

https://music-electronics-forum.com/search?q=RG75
Search Result

[Shawng]

Many thanks for that, that’s a great help.

[g1]

It's the G2 you want?

[Shawng]

Thanks that’s great .