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SurfGuitar101 Forums » Gear »

Permalink Another 6g15 clone build

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tubeswell
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Joined: Sep 24, 2011
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Link Posted on Jun 18 2012 10:28 AM

The reflected load for a tube is a matter of being in the 'ballpark'. The GE 6K6 tube datasheet specifies 7k6 load at 250V on the plate and 9k at 315V. But anywhere between 5k-12k will work, with 7k-8k5 being more 'optimal'. Similar with a 6V6.

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He who dies with the most tubes... wins

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busse
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Joined: Jun 17, 2012
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Link Posted on Jun 22 2012 02:13 AM

What's the tonal difference on the reverb if you use a 6K6 or a 6V6 output tube?

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irv78
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Link Posted on Jun 22 2012 07:53 AM

busse wrote:

What's the tonal difference on the reverb if you use a 6K6 or a 6V6 output tube?

The 6K6 tube has less power than a 6V6 and will sound less agressive/harsh. 6K6 tubes are still readily available and fairly cheap to get on ebay.

Just try both and see what you prefer - I'm definitely in the 6K6 camp.

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tubeswell
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Link Posted on Jun 22 2012 01:37 PM

The 6K6 has a lower transconductance than a 6V6 (which means that the plate-current swing is lower for a given grid-voltage swing). This makes the 6K6 less prone to clipping. (Good reverb is all about keeping the signal as clean as possible)

A 6K6 also runs closer to optimal bias in the 6G15 circuit. The reverb driver output tube's cathode resistor is 1k, which makes the 6V6 run cold.

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He who dies with the most tubes... wins

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Last edited: Jun 22, 2012 13:40:50

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