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Surfy Bear FET Reverb

Posted: Fri Apr 26, 2013 12:07 pm
by kikey
The Surfy Bear FET Reverb

Here is something I spent some time with. :)
A JFET/MOS version of the classic Fender 6G15 standalone reverb.
The topology is almost identical, the tubes in the schematic is replaced with JFETS/MOSFETS and the OT is replaced with a current source.
Reverb pan: MOD.
Cabinet is about 10% smaller. Power supply: 12DC adapter.

More info and PCB layouts can be found on my website:http://surfybear.weebly.com/FET-Reverb.html

ImageImage

Re: Surfy Bear FET Reverb

Posted: Fri Apr 26, 2013 12:57 pm
by Grandmasterdavid
Awesome.Make a few and sell them,its a nice design.

Re: Surfy Bear FET Reverb

Posted: Fri Apr 26, 2013 1:16 pm
by kikey
Grandmasterdavid wrote:Awesome.Make a few and sell them,its a nice design.
Thanks :D
But I think most people prefers the tube based version.

Re: Surfy Bear FET Reverb

Posted: Fri Apr 26, 2013 1:21 pm
by Z*Z*Z
I would buy this instantly if its reasonably priced - Im waiting on those sound clips :blush:

Re: Surfy Bear FET Reverb

Posted: Fri Apr 26, 2013 1:53 pm
by Grandmasterdavid
Z*Z*Z wrote:I would buy this instantly if its reasonably priced - Im waiting on those sound clips
I second this oppinion.

Re: Surfy Bear FET Reverb

Posted: Sat Apr 27, 2013 7:27 am
by kikey
Z*Z*Z wrote:I would buy this instantly if its reasonably priced - Im waiting on those sound clips
Thanks I will let you know if/when I have one to sell :)

You have some really good surf bands in your part of Europe.
I am a huge fan of Bambi Molesters and Threesome. :-*
I got some very good cd recommendations when I visited Belgrade last year.

/Björn

Re: Surfy Bear FET Reverb

Posted: Sat Apr 27, 2013 7:49 am
by PorkyPrimeCut
What is this dark wizardry? :w00t:

Re: Surfy Bear FET Reverb

Posted: Sat Apr 27, 2013 12:00 pm
by Z*Z*Z
kikey wrote:
Z*Z*Z wrote:I would buy this instantly if its reasonably priced - Im waiting on those sound clips
Thanks I will let you know if/when I have one to sell

You have some really good surf bands in your part of Europe.
I am a huge fan of Bambi Molesters and Threesome.
I got some very good cd recommendations when I visited Belgrade last year.

/Björn
Great, Urosh from Threesome is a good friend of mine and I also know Dinko & Dalibor - all great players :-)

Re: Surfy Bear FET Reverb

Posted: Mon Apr 29, 2013 1:42 am
by dan_abnormal
kikey wrote:The Surfy Bear FET Reverb

Here is something I spent some time with.
A JFET/MOS version of the classic Fender 6G15 standalone reverb.
The topology is almost identical, the tubes in the schematic is replaced with JFETS/MOSFETS and the OT is replaced with a current source.
Reverb pan: MOD.
Cabinet is about 10% smaller. Power supply: 12DC adapter.

More info and PCB layouts can be found on my website:http://surfybear.weebly.com/FET-Reverb.html

ImageImage
So cool, I'd be all over it! :?

Re: Surfy Bear FET Reverb

Posted: Mon Apr 29, 2013 11:44 am
by josheboy
I am very interested in hearing this tank! Please post sound samples. You also might want to post about this tank design over in surfguitar101. Most of them (myself included) prefer tubes, but if the sound is good, you might win over some folks.

Oh, and Threesome and the Bambi's are AMAZING!

PS - I am going to the Surfer Joe festival in Livorno Italy this year. I am looking forward to experiencing the Euro Surf Scene!!

Re: Surfy Bear FET Reverb

Posted: Wed May 01, 2013 10:47 am
by kikey
josheboy wrote:I am very interested in hearing this tank! Please post sound samples. You also might want to post about this tank design over in surfguitar101. Most of them (myself included) prefer tubes, but if the sound is good, you might win over some folks.

Oh, and Threesome and the Bambi's are AMAZING!

PS - I am going to the Surfer Joe festival in Livorno Italy this year. I am looking forward to experiencing the Euro Surf Scene!!
Very nice to hear that you're interested in the reverb. :D
I am trying to get hold of a mic for creating a few sound samples!

Unfortunately I cant make it to the Surfer Joe Festival this year... :(
But I plan to go there next year!

Re: Surfy Bear FET Reverb

Posted: Wed May 01, 2013 10:25 pm
by surfin_bird
try to get to amsterdam to the north sea surf festival! BTW cool looking amp, start selling it!

Re: Surfy Bear FET Reverb

Posted: Sat May 04, 2013 9:42 am
by archimedes
I am also EXTREMELY interested in this! I have thought of this exact idea for a while (4 or 5 years) but have neither the know how nor the patience to take on building it. Thanks so much for putting the time into such a cool idea! I saw your post at surfguitar101 last night. I have a Gomez G-Spring and it is fantastic but can be a little finicky in the practice space I usually play in. Probably due to the old wiring of the house, but sometimes it hums somewhat loudly. The size and look of a tube unit is something I appreciate as a traditionalist but as I continue to get older, size, weight, and overall portability are things that appeal to me greatly. I would love to have a reverb tank driven unit that isn't much larger than the tank itself and can sound lively and "drip" the way only tube units do. Looking forward to some sound clips and the possibility of you selling these in the future! I think more people would be interested in these than you might imagine.

Tim

Re: Surfy Bear FET Reverb

Posted: Mon May 06, 2013 9:26 am
by kikey
Thanks a lot :)
A am glad the info is appriciated.
I hope to be able to provide some sound clips soon!

Re: Surfy Bear FET Reverb

Posted: Mon May 06, 2013 9:02 pm
by WonderCouncil
Wow that is great looking! What is the MOD? In terms for reverb I mean. Is it an actual spring tank or one of those reverb bricks? I'd totally be into one of these with an extra long reverb tank :?

Edit- Should have read your website first! :blush: