30-07-2022, 09:28 AM
Many thanks to all for your thoughts and comments
I originally bought the Marshall Class 5 to use at home, it was cost effective at the time (£299 in 2009) and was still being made in England. Its a good small amp but alas it rattles due to the cost saving in the chassis design and build and also the position of the valves for the first model which are position very close to the speaker (see 1st photo below) which is why I believe the valves were repositioned at the bottom of the chassis (see 2nd photo albeit this is a modified amp with an extra valve as seen).
The down side is that it is a wee bit on the loud side for home use but that is not an amp design issue.
The 2nd model has a different board with leads at one edge leading to the valves.
I do think the easiest thing to do is to drill holes in the chassis body and leave the circuit board "as is". I have some suitable transformers I am sure to use.
I am also planning to strengthen the chassis by adding two small bars of metal (mild steel or aluminium, is strong enough for the size) either side of the bottom of the chassis to lock it together and at least stop this from potential rattles. I have seen someone else do this and they indicated that it did make an improvement.
Best Regards
Rob
I originally bought the Marshall Class 5 to use at home, it was cost effective at the time (£299 in 2009) and was still being made in England. Its a good small amp but alas it rattles due to the cost saving in the chassis design and build and also the position of the valves for the first model which are position very close to the speaker (see 1st photo below) which is why I believe the valves were repositioned at the bottom of the chassis (see 2nd photo albeit this is a modified amp with an extra valve as seen).
The down side is that it is a wee bit on the loud side for home use but that is not an amp design issue.
The 2nd model has a different board with leads at one edge leading to the valves.
I do think the easiest thing to do is to drill holes in the chassis body and leave the circuit board "as is". I have some suitable transformers I am sure to use.
I am also planning to strengthen the chassis by adding two small bars of metal (mild steel or aluminium, is strong enough for the size) either side of the bottom of the chassis to lock it together and at least stop this from potential rattles. I have seen someone else do this and they indicated that it did make an improvement.
Best Regards
Rob
if all else fails...read the instructions!
