Any one been inside a Komet 19 yet?

[Kborg]

Pics?

[M Fowler]

No I haven't but always interested in what people can provide. I like the looks of the new K19 combo as well.

Mark

[meddler]

I have the layout mapped out on paper. Tone control is Supro-style. Saturation control is the most unique element of the circuit. The rest is pretty standard 18 watt variation.

[Structo]

What are they doing for the saturation control?

[dayn]

I looked inside mine when I had it. Not an amp builder so have nothing to offer, other than most resistors had black heatshrink tubing on them to hide thier values.

[leaveitalone84]

I'd like to see some photos. Apparently its all PTP.

From what the guys on 18watt and medler says, it's based off the SuperliteTMB, Volume 1 is just relabeled Saturation and it has a Supro Style Tone control.

Medler which supro model?

I'm looking at modding a Valve JR close to this with a better OT and a few more holes punched in the chassis

[M Fowler]

I'm bumping this thread because I want gut shots.

[RobBozic]

I'm bumping this thread because I want gut shots.

I'll be happy with the topology.

Is V1 a paralleled triode or is it cascaded?

If it's a paralleled triode it might be Supro Tone control which is tweed style with 500K pots & a 3.3n to ground off the tone pot & then into LTPI & then the saturation might be a PPIMV.

If it's cascaded it might be triode 1 into volume with 2-way bright switch, then into triode 2 & then into supro style volume & tone, into LTPI.

Anyone else got more info?

Rob

[M Fowler]

This has been one elusive amp for sure.

[RobBozic]

Actually I was giving this some thought last night after I was looking at Doug Hoffman's 18 watt stout schematic.

And I think the Komet 19 follows the same topology, however you have to swap the tonestack to the supro style & the Komet 19 has a solid state rectifier & there's obviously more differences between the two amps.

However, with the Komet 19 'saturation' control I think it just varies the grid bias after the second gain stage. I think there's a fixed amount and then the 'saturation' control just increases the resistance to ground.

[RobBozic]

However, with the Komet 19 'saturation' control I think it just varies the grid bias after the second gain stage.

Actually I meant to say that I think the 'saturation' control increases the resistance to ground BEFORE the second gain stage.

[Colossal]

Actually I meant to say that I think the 'saturation' control increases the resistance to ground BEFORE the second gain stage.

Hmmm. So it's just a gain control by another name (?) It sounds like two cascaded gain stages with a (gain/saturation) pot in the middle?

[dartanion]

I haven't been inside one, but have heard a few in person. They sound like nothing more than a tweaked 18watt lite.

[RobBozic]

Here's the preamp I've got in my little fixed bias 6V6 amp.

I think the Komet 19 is similar to this, except with the Supro tonestack & probably different preamp values.

Rob

[RobBozic]

I went & played with the homebrew amp today & will probably ditch that 'saturation' control as I had it in my amp. It's a good way to get a bit more crunch out of the amp, & a good way to tweak the gain as well.

Someone mentioned earlier that the Komet 19 is based of the 18 watt TMB Superlite, & I think they're right. Although that amp has a tonestack after the 2nd gain stage & the Komet 19 probably just has the 'saturation' control placed they're.