30-01-2014, 10:11 AM
Mulling this over in what passes these days for a brain, I realised that although I'd used Bowood for items I had never bought pots from them. Do they not stock metal shaft pots? Perhaps not, I haven't looked. Actual values of pot used for volume controls in valve gear don't have to be precise as valves are tolerant of variations, hence a 500k pot could be substituted for a 1M pot without a noticeable difference but what is more important is the law of a pot. Log pots should be substituted for log, lin for lin.
Many pots on the market these days have critically short shafts and would need extenders for sets such as the DAC90A. Finding a source of EXACTLY the right pots with a metal shaft would be useful. Having pots made can prove costly.
I bought from Blore Edwards a year or two back when building a stereo amp. The products were OK but not brilliant (stereo ganged of course) and expensive, too.
Plastic spindles are a nuisance, not simply because they feel less secure but they are usually if not always 6mm and old quarter-inch knobs have to be packed, an untidy answer to the problem. However, used on a set such as a DAC90A they isolate the knob from the chassis and even if the knob comes off there's no chance of any end user ever getting a shock from plastic!
Tony
You pays your money and takes your choice, as usual in this world.
Many pots on the market these days have critically short shafts and would need extenders for sets such as the DAC90A. Finding a source of EXACTLY the right pots with a metal shaft would be useful. Having pots made can prove costly.
I bought from Blore Edwards a year or two back when building a stereo amp. The products were OK but not brilliant (stereo ganged of course) and expensive, too.
Plastic spindles are a nuisance, not simply because they feel less secure but they are usually if not always 6mm and old quarter-inch knobs have to be packed, an untidy answer to the problem. However, used on a set such as a DAC90A they isolate the knob from the chassis and even if the knob comes off there's no chance of any end user ever getting a shock from plastic!
Tony
You pays your money and takes your choice, as usual in this world.
