NZGuitars.com : Filling you with GAS since 2003

jeremyb wrote: ↑Thu Apr 14, 2022 5:52 pm Courier just showed me his package so the Laney Cub 8 Super is going to get a Jansen C8R to go along with the JJ toobs that I've had sitting ready from Conway's bluporium of guitar porn!

New Jansen C8R from Denche?

I'm a techy type - can't help it. "Can a different cab affect the gain"? No. Can a different cab effect the reproduced sound, yes.

Tech alert... "gain" occurs with active components such as valves, transistors, FETs etc. Pickups don't have gain, speakers don't have gain. So assuming the same impedance speaker load (be it a 6", 8 ohm Sony speaker in a box or a 412 8-ohm Marshall cab), with the same guitar, then th...

Jay wrote: ↑Tue Apr 05, 2022 2:27 pm What's not to like?

Vertically mounted soldering strips, 25W rail heater, few dry joints, ancient diodes, dried mouse piss and a parts layout that looks worse than a traffic jam in Mumbai...

Love it

That's mojo baby!

In a 6L6 valve, pin 1 is spare. In a 7027A valve, pin 1 is internally connected to pin 4 (the screen grid). So if the amp in question has nothing soldered to pin 1 on the valve base then you should be OK (apart from checking bias). But if the amp in question has something soldered to pin 1 on the va...

My first real amp was a Jansen Bassman 75.

Measure the resistance across R21 in circuit (but NOT powered up). You should get a reading of 110 ohms or close.

sizzlingbadger wrote: ↑Mon Mar 28, 2022 12:50 pm I have a tube of ADOS RTV Neutral Cure Silicone, but it looks like its gone hard in the tube now, its so old.

Thanks, I'll see if I can get it somewhere... Found it at Repco but still open to any other recommendations!

Thanks JB, that looks worth a shot.

sizzlingbadger wrote: ↑Mon Mar 28, 2022 8:11 am Ordinary silicone sealant is good, the clear stuff looks a bit tidier.

Ta, I was reading that it contains substances that are corrosive (to copper tracks etc) - there is an "electrical" silicon but I can't find any! Cheers.

Just wondering what product the amp techs are using to adhere large electrolytic capacitors together to damp vibration? It's usually white rubbery (silicone?) flexible stuff!

jeremyb wrote: ↑Fri Mar 25, 2022 8:16 am Warehouse G8C speaker to go in the Laney Cub Super8!

If that doesn't butter your toast JB I've got a brand new Jensen RI P8R. Hit me up if you want to try it.

Here's a possible gem - these are genuine Fender water-slide decals for Telecaster, Stratocaster, Precision Bass & Jazz Bass. They have Fender part numbers - apparently back in the day you could get spare decals from Fender!

Bg wrote: ↑Sun Mar 20, 2022 4:43 pm man you just need a valve based oscilliscope to go with this

(Embarrased) - I've actually already got a Tektronix digital scope

Crikey.. I wouldn't know where to start with that thing. Awesome nonetheless It came with the manuals so I started with them :yawn:. Haven't plugged it in yet (let alone plugged a valve in to test)! I got hundreds of valves too :D anything useful or are they radio ham? (CQDX @JB) I've only just sta...