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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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 Post subject: Re: 6CY7 Stereo Amp
PostPosted: 25 Jun 2018, 04:42 
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Joined: 28 Dec 2017, 05:13
Posts: 7
Location: Maryland, USA
Suncalc wrote:

I hope this helps.


Very much so. Thanks for taking the time to explain all that.

Suncalc wrote:

It was only after thinking about it for a while that I realized that a simple 3dB difference in speaker sensitivity meant the spearers only sound half as loud. By the time you get to a 6dB difference it's really shocking how little sound comes out of an insensitive speaker. This is one of the reasons that today, most people recommend simple high sensitivity drivers (mid 90dB range) for these small SETs. I routinely use small 2-way bookshelf speakers with sensitivity of about 90dB with this amp for casual listening.


Until I built the 4S and the Lacewood, my tube "experience" (or lack thereof) was mainly cobbling together low-wattage guitar amps. Some years back I had built a Fender Princeton style circuit in a head for a friend to use in his studio. I think it ended up in the 4 to 7 watt range. I remember how shocked we were at how loud it was hooked up to a 4x12 Marshall cabinet loaded with Celestion Vintage 30's. I just looked up the specs on the Celestions, and they are advertised at 100db sensitivity. This explains a lot.

Anyhow, now I have a great excuse to build another set of speakers. :up:

Thanks again Matt


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 Post subject: Re: 6CY7 Stereo Amp
PostPosted: 17 Mar 2019, 18:08 
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Joined: 06 Apr 2009, 10:08
Posts: 1588
Location: US Pacific Northwest
Bass Response!

I am sitting in my office and working on my 6L6 SE-UL analysis write up and listening to this fine little amplifier.

Well, on the play list comes up Stevie Ray Vaughan and Albert King collaborating on a great rendition of "Pride and Joy" off of the album "In Session". I defy anyone to listen to this track, through this amp with some well match speakers and then claim that there is insufficient bass.

I've got both well controlled thumping bass and super clean blues guitar riffs. This album should put a smile on your face!

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Matt
It's all about the Glass!
http://www.CascadeTubes.com
Cascade Tubes Blog


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 Post subject: Re: 6CY7 Stereo Amp
PostPosted: 03 Jun 2019, 14:53 
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Joined: 28 May 2019, 13:53
Posts: 1
Hey Matt,
I was wondering did you ever get around to making a 6CY7 2.0 or monoblock (maybe with higher output, fingers crossed)? I wanted to pair the amp with Frugal Horns but I wanted to check with you before ordering parts incase you had better plans in the works. Also it would be really fantastic if you could take the pictures of the 6CY7 build and label grounding and wires like you did on the 4S preamp. This would be my first build and while I understand the schematic and have read over everything a few times I want to have a solid grasp on things before I order parts.


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