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Messages - bandmbill

#1
I have added a 50mm x 35mm x 1.5mm bit of aluminium as a heatsink - it gets warm quite quickly but has worked for a couple of hours without a problem so far.

Suggestions for an alternative regulator?
#2
I think that the Belton Reverb modules came from Small Bear Electronics LLC - around 20USD each.

Cheers

Bill
#3
Image of where bits fit - in a PDF
#4
Having problems posting an image - keep getting a server error 500 - any ideas?
#5
Picture of how the bits fit.

Cost - the Belton Brick + 1GBP.
#6
Schematic of add-on.
#7
Been working on this one - reasoned that the amp's reverb circuit should have been designed to suit the spring fitted so I should be able to sub the brick in with a minimum extra components.

Put a pair of 47K trimmers in as input and output volume controls - a pair of 100nF caps to block DC - a 7805 with a couple of caps to get 5V to drive the brick.

Didn't have a schematic for the Kustom but had one for a 15W Marshall - worked out that I connect the out from the brick to where the spring was connected - the input for the brick connected back to the middle of the divider feeding pin 3 of the 4558 that drove the spring - had the 7805 powered from a 9V battery at this stage - all works OK.

Needed to find power from the amp - tried to connect to the +17V driving the pre-amps but this pulled the +17V down to +7V  now connected to the +22V supplying the power amp IC and all is fine but the 7805 will need a heatsink.

Sounds good - much better than the spring - will play with setting the in and out levels a bit to get useful travel on the reverb level knob.  Will also need to tidy up the in and power connection.
#8
Amplifier Discussion / Re: KGA16R Schematic
March 17, 2011, 07:37:24 PM
I did email them a week ago - no response yet!

Bill
#9
Amplifier Discussion / Re: KGA16R Schematic
March 17, 2011, 07:09:07 PM
Nothing has gone wrong yet.

I did want to think about a few tweaks - perhaps replacing op-amps - seeing if I can add a channel change and reverb on/off switch - improve power supply.

If I get bored I might try producing a schematic!

Cheers

Bill
#10
Amplifier Discussion / KGA16R Schematic
March 17, 2011, 11:05:15 AM
Anyone got a schematic for a Kustom KGA16R - or know where to find one?

Cheers

Bill
#11
Hi All

I have just got a Kustom KGA16R amp on ebay.  It has a short Belton 2 spring reverb that works but doesn't sound too smooth - I was thinking of replacing it with a Belton reverb module - I will need to add a 5V regulator - I was thinking of using the circuit from the Belton PDF spec sheet for this module (without the direct signal path) - anyone done the same or similar?

Bill