Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: JBP on February 01, 2012, 07:55:25 pm

Title: Bumble B+/Solow Watt ECL84
Post by: JBP on February 01, 2012, 07:55:25 pm

dance like a butterfly, sting like a B+............
This is my take on tubenits' Solow Watt ECL84. Love this bedroom amp. I can dial in breakup from lite dirt to almost endless sustain, all at resonable volume levels. Very well balanced and clear overdrive. I love the fact that a set of NOS tubes can be had on fleabay for under $20. This is a fairly simple build and at a cost under $150 it's a alot of tone/tones for the buck. Highly recomended. Thanks for your work on this design Tubenit, Jeff

   p.s. anyone care to guess what my next build will be ? clue attached

Title: Re: Bumble B+/Solow Watt ECL84
Post by: duke of earl on February 01, 2012, 08:34:25 pm

Very nice work JBP. I have a friend who owns a "School of Rock" nearby and I want to donate a nice tube amp to the school. He likes the "Brownsound" so I am looking for a design that runs low B+. Sounds like your build would be a nice option for me.

Title: Re: Bumble B+/Solow Watt ECL84
Post by: tubenit on February 01, 2012, 08:44:00 pm

WOW!!   That turned out way better than mine!  Super job there!
 :worthy1:

Glad you like the amp and the tone! 

I'm thinking that board looks suspiciously like a TOS something  :dontknow: :icon_biggrin:

THANKS for sharing the photos!     IF you make soundclips, please share one.

With respect, Tubenit

Title: Re: Bumble B+/Solow Watt ECL84
Post by: DummyLoad on February 01, 2012, 11:24:49 pm

nice work!

 :thumbsup:

Title: Re: Bumble B+/Solow Watt ECL84
Post by: Willabe on February 01, 2012, 11:55:01 pm

Very nice! I love the light in the bees tail! Great idea!

Were did you get the chassis, looks nice.

And what about the face plate, did you make it? If so how?

And the iron?

                             Brad     :icon_biggrin:

Title: Re: Bumble B+/Solow Watt ECL84
Post by: JBP on February 02, 2012, 12:15:29 am

Thanks everyone !!     Iron-  Musical power supply      Chassis- Dirty Dawg
  Faceplate is 1/16" plexi, inkjet water slide decals reversed and paint.

Title: Re: Bumble B+/Solow Watt ECL84
Post by: JBP on February 02, 2012, 12:23:09 am

Oh, and TOS is the correct answer.I really should get some things done around the house first. But.........

Title: Re: Bumble B+/Solow Watt ECL84
Post by: TIMBO on February 02, 2012, 12:31:17 am

GREAT job,nice and neat.I've been delayed in getting mine built and this amp seems to be turning out to be a winner  :worthy1:. I've have just discovered the water slide decal as well and makes the face plates much easier to make. I use a coloured vinyl with a sticky back then the decals and a clear vinyl over the top, easy. JBP, the sw. marked as BOOST is that the one that engages the 1uf cap to the V2a cathode as i was not sure that this was it purpose  :think1: and did you build it as per T's schem. Thanks for the great pics

Title: Re: Bumble B+/Solow Watt ECL84
Post by: JBP on February 02, 2012, 12:56:35 am

Thanks Timbo. Yea I followed T's latest schemo to the T. You are correct about the boost switch. It gives it a little kick, not huge, so I labeled it "boost" as per T's layout.

Title: Re: Bumble B+/Solow Watt ECL84
Post by: TIMBO on February 02, 2012, 01:40:24 am

Thanks, well done :thumbsup:

Title: Re: Bumble B+/Solow Watt ECL84
Post by: Tone Junkie on February 13, 2012, 03:32:55 pm

Looks very nice.
Bill                                                     :happy1: :happy1: :happy1: :guitar1

Title: Re: Bumble B+/Solow Watt ECL84
Post by: moonbird on February 23, 2012, 07:11:34 pm

Thanks for the post and terrific photos JBP.

Would you mind saying with MPS PP transformer you ended up using??? the 15 watt or the 20 watt? thx again.

Title: Re: Bumble B+/Solow Watt ECL84
Post by: JBP on February 23, 2012, 08:49:42 pm

Thanks for the comments. 15 watt tranny. I figured that was plenty for this build. Jeff