Who has rack ears (edit: and knobs) for vintage Gallien-Krueger 400RB's?

[ossyrocks]

7 minutes ago, rwillett said:

 

Would you mind passing the details of this place on please? I sometimes need stuff done and I normally hit things with a big hammer until they look about right. Useful to know a local one who has more finesses.

Rob

 

No problem Rob, It's Quay Fabrications in Lancaster - https://www.quayfabs.co.uk/

 

The place is rather rough and ready, and there's sparks flying and torches burning stuff.

 

Edited January 31 by ossyrocks

[rwillett]

1 minute ago, ossyrocks said:

The pace is rather rough and ready, and there's sparks flying and torches burning stuff.

 

Thats my sort of place

[ossyrocks]

Heads up: 800RB Rack Ears on ebay! Cheap too.

 

https://www.ebay.co.uk/itm/276900741681

 

You're welcome.

Rob

 

 

[Minininjarob]

20 hours ago, ossyrocks said:

Heads up: 800RB Rack Ears on ebay! Cheap too.

 

https://www.ebay.co.uk/itm/276900741681

 

You're welcome.

Rob

 

 

I was about to post the same link! Surely there can’t be many of those left in the world brand new???

[cetera]

Polar Audio were GK's old UK distributor so they must have found some at the back of their UK warehouse....

[The fasting showman]

On 26/02/2025 at 14:03, cetera said:

Polar Audio were GK's old UK distributor so they must have found some at the back of their UK warehouse....

There's some very useful items from Polar currently on ebay for keeping old GKs working. 

I had a 700rbii that was a potential spare parts donor; working preamp and transformer, owes me £50ish. It had gathered dust for 2 years.

 I just dropped on a power amp module from Polar for £50, took out the old one and replaced it. The repaired 700rb sounds better than my old faithful.

Worth looking on eBay for Polar's GK spares if you've got a clapped out GK. Or if you want backup items; techs don't seem to want to repair the power amps, I was quoted £150 at best.

[The fasting showman]

...the Keen Ocean transformer Polar have got listed on ebay is for 400rb mk3 and mk4, also backline 600 models. 

The amp repairer I use used one in my old 400rb mk2 to convert a US model to UK voltage. It worked fine but it involved drilling a hole for the toroidal transformer. Just a heads up if anyone wants to keep it as a spare. If you can find a backline 600 they're also useful for the same reasons....decent amps in their own right.

 

[The fasting showman]

This is the dead 700rb ii power amp board. As you can see, it's gathering dust so if anyone wants it free for spares or a possible fix up, let me know.

 

It's quite possible that the fan may work still for example, could be handy if you've got a 700rb.

[Minininjarob]

1 hour ago, The fasting showman said:

This is the dead 700rb ii power amp board. As you can see, it's gathering dust so if anyone wants it free for spares or a possible fix up, let me know.

 

It's quite possible that the fan may work still for example, could be handy if you've got a 700rb.

What was wrong with it? 

[The fasting showman]

3 hours ago, Minininjarob said:

What was wrong with it? 

As I mentioned a few posts ago, I bought a kaput 700rbii off ebay for around £50 a few years ago.

I did a DIY fault check working front to back and established that the preamp and DI worked fine. Upon connecting a cheap speaker to the output I heard a loud thud through the speaker; I assume it's gone DC at the output.

Our local amp tech had a quick look and issued an I won't charge anything but cease and desist...he said the transformer is fine, keep it for spares. He felt that digging through the pcb wouldn't be cost effective compared to buying a second hand working amp.

A different repair company  quoted me £150 to fix the amp presumably gone DC.

Obviously I was chuffed to drop on a new power amp module from Polar last week for £49. I now have 2 working 700rb amps.

So the dead module is free to anyone, would be good for a tech-y 700rb owner to cannibalise or fix.

[BassmanPaul]

On 31/01/2025 at 07:31, ossyrocks said:

 

No problem Rob, It's Quay Fabrications in Lancaster - https://www.quayfabs.co.uk/

 

The place is rather rough and ready, and there's sparks flying and torches burning stuff.

 

Sounds like my kinda place!!! LOL