Ask Amp Tech Expert Skip Simmons

Hello,

I have just ordered a second hand CUB 10 amp.I

If I were to replace the tubes what would you recommend?

Let me say I am not at all a gear-head, but I like experimenting :)

Another thing I wanted to ask you is if you could recommend (to your best knowledge) another 10" speaker I could find in Europe (particularly in Spain) with a comparable quality to the Weber 10A125 that Dave recommends in the amp review ? continue reading...

Hello Skip,

As a novice about to try and make an amp I would have thought it best not to mess about with a design classic. That said I just wanted to ask if there are any simple/minor tweaks to a Fender 5F2-A circuit that would be appropriate for harmonica amplification.

Thanks

Joel

I have the Windy City 8" 5 watt amp and have recently noticed a low volume 60Hz hum.  I have checked with clean power, ground with nothing conected and hum stays consistant.  Not effected by swithches, volume or tone.  Should I replace the Tubes? or is there a test I can perform to issolate the issue?

Thanks Brian 

Hi Skip

I have got the idea in my head that it might be an enjoyable project to build my own amplifier. How realistic is it to think that I might learn what I need to know from a book and successfully make something from a kit? I am a cabinet maker by trade but I suspect the cabinet is the easy (and less dangerous) bit. If it is feasible is there a book you could recommend? Thank you.

Hello skip .

I have been given a blackstar amp .

https://reverb.com/uk/p/blackstar-ht-5r?hfid=36513576&utm_source=google&...

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Evening,

Having a respected Tech work over a Masco MA 25 I picked up for a good price. It's not pretty (and will need some work) but I'm crossing my fingers. Just looking for some recommendations on any harp friendly adjustments. Or maybe it kicks ass as is after a nice tune up?  Any and all thoughts, stories, or warnings welcome. 

Thanks in advance.

SJ

P.S.  The amp appears like it's not modified in any way. 

Your thoughts on the Stage 5 Delta V6?

Hi Skip I have a Hotrod Deville Im gona convert to a PTP 5F6-A bassman. Got few of questions, 1. Im gona use the devilles FWB rectifier set up, I was gona put a 20w 200ohm "sag" resistor between the rectifier and first filter cap also this should help drop the voltage alittle too right?  2. continue reading...

Laney is replacing CUB 10 with Cub Super 10.

The major difference seems to be in the Power tube.  

I found the interenet that "EL84 is more sensitive than 6V6, therefore will overdrive more easily"

By moving from two (2) 6V6 to one (1) EL84, would we expect the sound difference to be between the Cub 10 and Cub Super 10?

CUB 10

Preamp Tube: 2 x ECC83Poweramp Tube: 2 x 6V6GT

Cub Super 10

Preamp Tube: 2 x 12AX7/ECC83

Power Tube: 1 x EL84

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Hi Skip, around 1969, my Father built from used parts he had purchased from the Flea Market, a Bass amplifier head for my Brother (which apparently still works). The name on the plate reads “THOROSON” 

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