Jordan Bosstone and Bossboost pictures

Sir H C · August 19, 2006, 04:12:08 PM

Dan N · August 19, 2006, 06:12:03 PM

Troublemaker!

So far that Californian is looking different from the DIY Bosstone we know and love. Have not started looking at the other yet.

Thanks for the killer photos!

Sir H C · August 19, 2006, 06:27:19 PM

And they sound completely different. The Nashville one is smoother, the California one sounds like it is ready to oscillate on almost every note. The boost is a nice clean boost. Now just have to find one more knob (got two off e-bay on a little passive mixer).

Dan N · August 19, 2006, 07:11:12 PM

Hard to see, but this is what I get for the Alhambra:

http://users.rio.com/senorris/junk/bosstoneCA%3f.gif

About the knobs, seems I've seen something similar on one of those telephone amp things that strap right onto the earpiece. Unfortunately, most of them are beige...

Thanks again for the photos!

brett · August 20, 2006, 04:23:45 AM

very informative
Any chance of schematics for comparison?
thanks

Dan N · August 20, 2006, 04:06:52 PM

The Tennessee is like Arons schematic with some value changes:

http://users.rio.com/senorris/junk/bosstoneTN.gif

aron · August 20, 2006, 04:29:58 PM

Dan,

Thanks for the work!

Sir H C · August 20, 2006, 04:40:21 PM

Dan, great work! The volume pot is about 150k on the CA one. I had that pulled so I measured it.

Bernardduur · August 20, 2006, 04:40:28 PM

Thanks man! Was just considering building one!

RLBJR65 · August 20, 2006, 11:05:42 PM

Interesting! I've also seen the Sho-Sound Nasville model with 3 - .05uF, 1 - 50pF, Q1 - MPS6513 and Q2 - 2N4249, unreadable diodes, resistors all the same as in Aron and R.G.s schematics. http://www.diystompboxes.com/pedals/bosstone.gif http://www.geofex.com/FX_images/bosstone.gif

Are those rectifier diodes? I can't find any data.

Thanks, for the great pics

Richard

Dan N · August 21, 2006, 12:28:51 AM

Chris, can you verify that that one cap in the Nashville is 47nf and not 47pf like in the other schematics?

Your description of the CA one has me raring to build one!

Sir H C · August 21, 2006, 07:20:32 AM

Quote from: Dan N on August 21, 2006, 12:28:51 AM
Chris, can you verify that that one cap in the Nashville is 47nf and not 47pf like in the other schematics?

Your description of the CA one has me raring to build one!

Okay, on closer inspection it says 47M. It is pretty chunky for a 47pF cap, but then again I have no clue on the voltage rating. Only other marking is the Z5F for the dielectric.

brett · August 21, 2006, 07:56:41 AM

Hi
The bypass caps look like 47pF ceramic cap in both models. 47nF would be too much,
The rectifier diodes are said to be 1N4001, but both 1N4001 and 1N4148 sound good.

The Nashville one probably has similar gain in Q1 to the other, inspite of the higher collector resistance on Q1 (18K+47k instead of 18k +18k). More importantly, I *think* Q2 gives more active loading (3.6 times ((47k+18k)/47K) instead of 2 times ((18k+18k)/18k). Someone should check that - I get the maths mixed up sometimes.

If so, it makes the gain of this circuit much higher than the usual schematic. For example, if Q1 has hFE = 150, the circuit overall has gain of 150 x 3.6 =540, whereas it is only 150 x 2 =300 in the usual circuit (18k + 18k or 22k +22k resistors).

Which makes me think - why not use a 10k resistor and a 50k pot wired as a variable resistor in place of that fixed 47k resistor? I think that would give gains from about 250 to 600.
cheers

Dan N · August 21, 2006, 02:45:46 PM

Thanks, Chris. I changed it on the schematic.

Interesting stuff, Brett! Thanks!

At some point this circuit went from being a hippy fuzz to a steel guitar tool. It appears that the Sho-Bud folks did some experimenting with values over the years.

Sir H C · August 21, 2006, 04:14:39 PM

Am I going to have to get a Sho-Bud version too?

A buddy used the Nashville one on an album and loved it a lot more than his boutique version of it.

I think I am going to have to make a pedal that works with these so that you can have them on the floor. Maybe so you can put two in with two switches. That would rule.

RLBJR65 · August 21, 2006, 04:36:42 PM

More pics. Sho-Sound, Nashville, model 6248 on the box.
http://aronnelson.com/gallery/view_album.php?page=4&set_albumName=Richard-Boop-RLBJR65

Sir H C · August 21, 2006, 05:12:45 PM

Pretty! Does that one have anything to protect the circuit board from the battery? None of mine had anything good for these modern metalic batteries. I think there was foam in some a long time ago but that because goo much like the MXR foam.

brett · August 21, 2006, 07:50:50 PM

Hi
This one seems to be the "standard" design with 2 x 18k resistors (brown-silver-orange-silver, one is partly hidden under the wires)
thanks for the photos
cheers

Dan N · August 21, 2006, 07:52:06 PM

Quote from: Sir H C on August 21, 2006, 04:14:39 PM
Am I going to have to get a Sho-Bud version too?

Ha ha, sorry, I was assuming Sho-Sound and Sho-Bud are the same folks. Don't know it for a fact. You probably have the Boss Tone corner of your collection covered.

RLBJR65, what a beauty! Thanks!

RLBJR65 · August 21, 2006, 09:08:10 PM

It is a beauty but its not mine

A friend sent the pics to me.

Sir H C, I saw lots of gut shots, these were the best. As far as I can see there was not any foam or anything else in there to keep the battery from bouncing around.

Anyone know where to get those input jacks?

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Jordan Bosstone and Bossboost pictures