Another Peavey 4 Mevie (me) NAD

[DielonKilo]

Can anyone confirm this would work or would it not fit?
https://www.sweetwater.com/store/detail/RMM900--rocktron-rmm900-7-pin-midi-cable-30-foot

 

[efiltsohg]

Can anyone confirm this would work or would it not fit?
https://www.sweetwater.com/store/detail/RMM900--rocktron-rmm900-7-pin-midi-cable-30-foot

don't know, but here's the pinouts for the XXX footswitch, from official peavey forum

The 7 pin DIN connector that looks like a midi connector is really just a seven conductor connector, with each pin doing a certain function when grounded. All we need is the pinout of the connector (what pin does what) to make relay switching work.
Relay switching devices typically use ¼” jacks. Some use mono jacks, and some incorporate two relays per jack using stereo jacks. Refer to the owner’s of your particular product for information concerning the jack configuration and wiring.

Here are the pin configurations of the DIN connectors on Peavey amplifiers.
On the 7 pin connector (looking from the solder side on the connector) the pins are numbered starting at top right (one o'clock position).

Triple XXX/JSX/3120/Triple XXX II:
Pin 1. +17VDC supply to pedal
Pin 2. not used
Pin 3. Ground this pin to detect footswitch
Pin 4. Ground/Common
Pin 5. Clean/Bypass
Pin 6. Ultra/Crunch
Pin 7. Effects

 

[DrakkarTyrannis]

Does anyone know if any old 7 pin din midi cable will work to connect the XXX to its footswitch?

The guy I got it from had the footswitch, just no cable.

I just have no experience with these types of cables, and don't know if theres something special peavey uses.

Someone help a brother out

If I remember correctly FJA makes custom cables and footswitches for those amps

 

[mogar]

The things I would do for a vtm60...

 

[DielonKilo]

don't know, but here's the pinouts for the XXX footswitch, from official peavey forum

Thank you, from my research I think any 7 pin din midi cable would work, I'm having the one I linked shipped to my technicians shop and he's gonna see if it works and make sure the footswitch functions properly. AND I'm hoping & praying this footswitch will work with my ultra 60 so I can use the crunch channel.

If I remember correctly FJA makes custom cables and footswitches for those amps

@DrakkarTyrannis thank you also, you have had a ton of good tips and tricks for the xxx.

Earlier you mentioned running a low gain tube in V1 or V2, what do you specifically suggest? a 12at7 or 12ay7?

 

[DrakkarTyrannis]

Thank you, from my research I think any 7 pin din midi cable would work, I'm having the one I linked shipped to my technicians shop and he's gonna see if it works and make sure the footswitch functions properly. AND I'm hoping & praying this footswitch will work with my ultra 60 so I can use the crunch channel.



@DrakkarTyrannis thank you also, you have had a ton of good tips and tricks for the xxx.

Earlier you mentioned running a low gain tube in V1 or V2, what do you specifically suggest? a 12at7 or 12ay7?

I used a 12at7 and it worked for me

 

[DielonKilo]

I used a 12at7 and it worked for me

I'm gonna pop a 12at7 in there when she comes back from her tuneup and screen resistor upgrade.

I'm just reading now about how you have to have the effects loop set just right to get the most out of the power amp/overall volume, can you elaborate on that?

 

[DrakkarTyrannis]

I'm gonna pop a 12at7 in there when she comes back from her tuneup and screen resistor upgrade.

I'm just reading now about how you have to have the effects loop set just right to get the most out of the power amp/overall volume, can you elaborate on that?

Turn the knobs on the FX loop all the way up and turn the FX loop on. Makes the amp louder. It probably wasn't on purpose but it helps for a volume boost/cut

 

[youngthrasher9]

@youngthrasher9 did you have to upgrade your screen grid resistors to run those? and if so what value ones did you get?

I don’t believe the tech upgraded them, my amp got rebuilt last year and he installed the E34Ls. He may have replaced the original resistors but from my understanding he did little if anything to change the circuit from stock .

 

[DielonKilo]

I don’t believe the tech upgraded them, my amp got rebuilt last year and he installed the E34Ls. He may have replaced the original resistors but from my understanding he did little if anything to change the circuit from stock .

Hmmmm I'm guessing he upgraded your SAM'S cause from my understanding (and scouring the internet for 2 days) you have to upgrade to 1k ohm ones to take E34L's BUT later model triple x's (ones with peavey delta logo, aka not pointy logo) came from factory with 750 ohm ones

 

[efiltsohg]

I'm gonna pop a 12at7 in there when she comes back from her tuneup and screen resistor upgrade.

use a JJ or NOS Philips 5751 (same specs as 12ax7 besides gain). 12at7 has lower resistance/higher dissipation and is not a drop in replacement

I'm just reading now about how you have to have the effects loop set just right to get the most out of the power amp/overall volume, can you elaborate on that?

it's just in series with the master volume, turning either of the knobs up or down affects the amp's volume. It doesn't change the tone at all & the master volume has a good taper so it's just something to check if you want more volume out of it

 

[DrakkarTyrannis]

use a JJ or NOS Philips 5751 (same specs as 12ax7 besides gain). 12at7 has lower resistance/higher dissipation and is not a drop in replacement

It's been a while but I'm sure you COULD use a 12at7. Your amp isn't gonna blow up or anything.

Looking at the Eurotubes page they use a 12DW7 for low gain. That may have been what I used. It's been years so it's hard to remember but I do remember I bought everything from the Eurotubes page so if that's what they use in low gain kits then it's what I used

 

[efiltsohg]

12DW7 is half of a 12ax7 and half of a 12au7 iirc

yes you can use all those tubes with the same pinout in place of a 12ax7, but there will be other effects on the tone besides just gain

eurotubes is a JJ reseller so I'm surprised they wouldn't use a 5751

 

[DrakkarTyrannis]

12DW7 is half of a 12ax7 and half of a 12au7 iirc

yes you can use all those tubes with the same pinout in place of a 12ax7, but there will be other effects on the tone besides just gain

eurotubes is a JJ reseller so I'm surprised they wouldn't use a 5751

I do recall some using the 5751. Couldn't hurt to try them and see what ya like.

 

[op1e]

I'm messing around with my ultra 120 now seeing where my pop and static is coming from, rolling tubes. It's probably needing a recap. I wanna have my tech murder it out with Res/Pres dual concentric in place of the reverb know, upgrade screen grids and see if I can run el34 variants or maybe JJ 6550's.

But anyway, in 12 years I never tried this; I turned the amp up and the gain all the way down on the Ultra channel and got great chimey cleans with this crappy Kramer strat with singles. So basically any channel can be the clean channel on these crazy amps, wild.

 

[Emperoff]

Does anyone know if any old 7 pin din midi cable will work to connect the XXX to its footswitch?

The guy I got it from had the footswitch, just no cable.

I just have no experience with these types of cables, and don't know if theres something special peavey uses.

Someone help a brother out

Hmm I don't think so. If the amp is not MIDI ready, the type of cable used is due to the footswitch being able to switch multiple things (wired to each pin of the cable). Simpler switches (Channel1/2) usually use a TRS Jack instead.

 

[DrakkarTyrannis]

I'm messing around with my ultra 120 now seeing where my pop and static is coming from, rolling tubes. It's probably needing a recap. I wanna have my tech murder it out with Res/Pres dual concentric in place of the reverb know, upgrade screen grids and see if I can run el34 variants or maybe JJ 6550's.

But anyway, in 12 years I never tried this; I turned the amp up and the gain all the way down on the Ultra channel and got great chimey cleans with this crappy Kramer strat with singles. So basically any channel can be the clean channel on these crazy amps, wild.

You'd need straight bottle 6550s. I don't think the regular kind will fit. Svetlana Winged Cs if memory serves

 

[Gmork]

Fellow "peavey head" here, congrats on the recent scores!
Heres my current collection.

 

[op1e]

You'd need straight bottle 6550s. I don't think the regular kind will fit. Svetlana Winged Cs if memory serves

I had Bob send me some straight bottle JJ's, I just ran a pair in case it taxed anything too much. I blew a resistor and molex eventually, dunno if that was why.

 

[DrakkarTyrannis]

I had Bob send me some straight bottle JJ's, I just ran a pair in case it taxed anything too much. I blew a resistor and molex eventually, dunno if that was why.

They've got straight bottle ones now? Cool

Yeah from what I recall, the amp needs a mod to run those otherwise you run into problems. I ran KT90s in my JSX with no issue after modding