50 or 100k

[john & Jake the dog]

Hi, now that I have taken the active components out of my system I need to control the kel84 power amp.
I have 50k and 100k blue Alps pots.
Is there any preference as to which I should use please.

[Really Aardvark]

I used a 50k alps, both shunted and straight, quite happily on the front of my kat6550 until I went active with a pre3

[david counter]

Hi John

I'd go with 100K it's what was standard on my kel84

[john & Jake the dog]

hi thanks but in confusion now
I've just found the instructions for my 84 build and it includes a 50k but I can't remember what came with the kit

[david counter]

thinking about it, I seem to remember that Peter C did change it to 50K when he started WD, so if your's is a WD one then 50K is right

[john & Jake the dog]

thanks David, that's cleared that up, I'll fit the 50

[bikerhifinut]

Either will work as well.
It's a high input resistance so theres no worries.

I've even had great results with a passive pre that used a 10k pot.

[Yellow]

Originally Posted by Really Aardvark

I used a 50k alps, both shunted and straight, quite happily on the front of my kat6550 until I went active with a pre3

Hi,

Interested to hear how you found the difference between the active and passive? I'm running an active pre currently, and been thinking of moving to a passive for ages but never got around to it. My experience a long time ago, was not that favourable towards passives, but I have an open mind and would welcome any feedback on passive pre's feeding the KaT6550.

Cheers,

Neil.

[john & Jake the dog]

Hi, I always prefer just a good quality volume pot.
I don't understand why a pre-amp is required with all it's circuitry when the signal from the cd player is a couple of volts, easily enough.
Only record decks would need pre-amplification and I'm sure that a small dedicated simple amplifier could bring it's signal up to line level.

My kel 84 just has an Alps and my DIY Ferrograph amp has just a blue Alps.

Simple is always best or that's what my GF say's to me, don't quite know what she's getting at

[pre65]

Impedance matching is a big part of it.

A zero gain buffer could be a good idea if CD is your source.