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Messages - joecool85

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Amplifier Discussion / Re: NO soldering wireless guitar amp project.
« on: November 12, 2017, 07:59:12 AM »
Nice job!  I've always wanted to do this but never took the time.  I think you may be the first to talk about this on here, thanks for sharing!

Tubes and Hybrids / Re: fender bassbreaker 45
« on: September 13, 2017, 08:16:14 PM »
wondering if anyone has any documentation/schematics on this amp?

everything works and ive got a solid swing coming from the PI to the power tube grids -

but the output section is not happening - im getting normal plate voltage but ZERO screen voltage and -3VDC or so grid voltage - problem is this amp has a pretty complex thing going on with the variable output and mosfet control B+ (or whatever it is!) -

i know schematics are hard to find for these - anyone have thoughts on a similar circuit i could use for reference?

Did this amp just recently come out?  It must be under warranty.  If so, contact Fender.  If not, you'd still need to contact Fender lol.  Good luck either way!

The Newcomer's Forum / Re: Modding a Honeytone Amp INTO a vocal pedal
« on: August 01, 2017, 07:35:13 AM »
DonĀ“t connect the headphone jack to the XLR connector.
In fact, remove that XLR to avoid confusion (as in: "WTF? ... I plug this into the mixer and it does not sound")

Make/buy a headphone plug to regular guitar plug cable and send headphone out to a mixer "Line Input" or if more than 20/25 meters away, ask Soundman for a "Direct box" .

That said, I guess you are inserting too much and worse: contradicting elements in your sound, I guess I know what sound are you trying to achieve and you will not.

Want a *real*  lo-fi sound? : plug your vocal microphone into a small cheesy amplifier, even the Honey Tone might do, put amp inside a closed case or if recording at home,in another room, a bathroom is perfect because of the natural reverb, and pick it with a microphone.

The *acoustic*  element is a large part of that sound.

Or use just the tube preamp, drive it hard so it becomes gritty, send it straigt to mixer, and there cut all bass, all high treble and increase some nasty mid-high frequency, think 2000 or 2500Hz .... instant Lo Fi  ;)

If yu want a boxy sound increase around 300/400 Hz.

Juan is right, you aren't going to get a lo-fi sound doing what you are talking about.  Even the cheapest of amps will pass through reasonable sound when taking the speaker out of the mix.  You need to mic that little speaker to get the sound you are looking for.  I love the idea of a closed case "amp box" to do this in.  Then you can set it up wherever you like.  Many times this is called an "isolation box."

Schematics and Layouts / Fender Frontman 25 DSP FM25DSP schematic
« on: July 12, 2017, 01:17:43 PM »
Fender doesn't have this file on their site anymore, and I just had to track it down (thanks  So I figured I'd share it here.

Tubes and Hybrids / Re: New amp day! Silvertone 1481
« on: June 19, 2017, 06:05:50 AM »
Thanks Enzo,

Yes, I should do more checking.... however...

I'm embarrassed to admit.... "I" may be the cause of the failed transformer.

You see, I drilled a hole for the secondary wires to go inside the chassis so I could install the speaker jack.

Foolishly I did this with the transformer still bolted in place... do you see where this is going....

That's right, the tiny pilot drill I used, punched through the chassis and nicked the winding's.  :grr

I then of course, removed the Tx and made the hole big enough to install a grommet for the wires.

Then inspected the Tx carefully with a magnifying glass and did not see any real damage, but the drill bit did go a small ways into the winding.

Fairly sure I screwed it up.
Bummer. However I feel for you. I did a similar thing where I was putting a heat shield back onto my wife's car. I had to drill a hole for the rivet and it was to go into the spare tire housing...I didn't remove the tire first. Made for a funny moment at the tire shop when I told them I drilled the tire LOL.

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Amplifier Discussion / Re: My K-20X
« on: June 10, 2017, 02:20:50 PM »
Hi Joe, Hope you don't mind me putting this here.

Thought we could compare our K-20 amps.
I opened it up to install a speaker jack and was mildly surprised at the differences to yours.

Mine was made 1993, which probably accounts for the differences.
Any idea what year yours is?

The layout and circuit board are obviously different.
Mine has the line out on the front panel and a fuse holder on back.

I was hoping to find the same circuit board as yours with the un-populated areas for the reverb.

Oh well, I'll just use a reverb pedal.

A minor feature I like is the slanted speaker baffle.


Edit; looks like it would be easy to make the drive switch, foot switchable.  :)
Yours is a K-20, mine is a K-20X. Almost identical circuit, but there are differences especially in the PCB. I'm not sure of the year on mine because it isn't stamped. But I bought it around 2000.

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Tubes and Hybrids / Re: NAD!
« on: June 08, 2017, 02:03:29 PM »
Ummm, yes this is the area of the forum for tube amps.

I guess this forum doesn't get much traffic from tube amp folks.

Oh well, mods please feel free to move this thread as you see fit.
I guess it would have been better in players corner.

You are correct, this is where this post belongs - no worries!  :tu:

Also, neat amp!

Amplifier Discussion / Re: Great little amp!
« on: May 26, 2017, 11:17:18 AM »
Not only me :)  , joecool is an early fan and always uses his  :dbtu:

True, I've had mine since 2000 or 2001 (I'd have to check, I still have the receipt.)  I love mine.  Only complaints are lack of low end out of the 8" speaker.  This can be fixed by running it through an extension cab.  Mine sounded killer through a 10" Dean Markley PA cab I picked up a while ago.  I sold it when I moved, but I might get something similar again at some point.

Preamps and Effects / Re: Fet version of the JCM800
« on: April 14, 2017, 11:34:19 AM »
Now I have only "full version" boards (preamp+5WPA+PS)
For separate preamp I can offer gerber/drill files:

That's perfect!  How expensive is it to get the boards?  Do you sell a kit with the components as well?

Preamps and Effects / Re: Fet version of the JCM800
« on: April 13, 2017, 01:03:41 PM »
Hi guys.
Unfortunately my IP was erroneously banned for a long time.
Now I returned back.
Hi, any one knows who have build this?
Many people build this preamp by youself, but unfortunately not in in English speaking countries (Russia, Ukraine, Israel). Many peoples purchased full version (F-800) with 5W poweramp.
I strongly recommend you to build LND150 version of preamp by the two reasons:
1. 2SK216 is very difficult to buy (they end of production, there are many fake ones at ebay)
2. LND150 more close by sound to the tube one.
Also this version does not require any trimming after assembling.
Some responces about sound of the F-800 you can read in this thread
Unfortunately in Russian, but you can use Google translate.

Sorry about the block, KMG, and welcome back!

Also, is there a kit for this available?  Parts and PCB?

Amplifier Discussion / Re: Sunn Coliseum 300 bass Schematic....
« on: April 05, 2017, 08:35:14 PM »
Trying to attach a different schematic.

[attachment deleted by admin]

It seems the forum software didn't like your .gif file.  I think it was mostly due to it being over 7,000 pixels wide.  I have shrunk it down and converted to a .jpg file.  All seems well now!

The Newcomer's Forum / Re: Good or bad idea?
« on: March 22, 2017, 02:06:41 PM »
I think it's a great idea personally.  If power supply voltages don't work out, if you have room you could always move the power supply from the guitar amp along with it's preamp section.  Then just tap everything into the mains voltage and away you go.

Amplifier Discussion / Re: Fahey Amplifiers
« on: March 04, 2017, 08:09:38 PM »
I was thinking about it, any chance there could be a reverb built into this amp?

The Newcomer's Forum / Re: Just joined SS guitar!!!!
« on: March 04, 2017, 08:04:20 PM »
I'm with JM, good sounding amp!  If/when you draw up a schematic, I'd love to see it.  What kind of wattage output do you expect with a 142/147 based amp on +/-15v rails?

Tubes and Hybrids / Re: Homemade Tube amp blowing fuses
« on: February 28, 2017, 05:42:36 AM »
Wow! That's a looker! Great job!

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