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1
Honey Amp / Re: Power supply suggestions
« Last post by joecool85 on July 31, 2021, 09:14:30 PM »
Worrrd, I think I figured it out.

Much Appreciations!

Glad to hear it!
2
Honey Amp / Re: Thoughts on my new Honey Amp
« Last post by joecool85 on July 31, 2021, 09:13:33 PM »
" No power switch, but I can understand the omission, since this is supposed to be highly customizable. I have to pop the battery connectors to power down, but my enclosure choice makes that easy enough"

You could try a 3 prong switching jack that disconnects the battery ground when no cord is inserted.

Like pedals use.

Or just wire a switch inline with the battery - that's what I do.  I'm not a fan of onboard power switching, even when it is for a battery amp.

Regarding power output, it is an LM386 so it's about as loud as I could get it.  If you need more headphone volume, try using a lower resistance value for R10.  If you use 10 ohm it should just about blow your ear drums with any normal headphones - mine certainly did!

I'm planning another battery based kit, probably power amp only.  This one would be based on the PAM8302 which gives 2.5w and runs on a really low voltage of 5v nominal.  I've been playing with the board from Adafruit and it's significantly louder than any LM386 circuit I've used.
3
Amplifier Discussion / Re: Roland JC120 - Split Line Out for Stereo?
« Last post by Jazz P Bass on July 29, 2021, 12:00:44 PM »
I am simply going by Roland's recommended values.
Leaving out the ground resistor defeats the divider circuit.

Play with the values if you like.
https://ohmslawcalculator.com/voltage-divider-calculator
4
Amplifier Discussion / Re: Roland JC120 - Split Line Out for Stereo?
« Last post by vin97 on July 29, 2021, 06:22:24 AM »
So more volume but higher impedance?
Any chance of hurting the amp?

Because higher level on the line out would be pretty nice. At the moment it is extremely low, basically instrument level. I have to route it through an external headphone amp to get usable levels.
5
Amplifier Discussion / Re: Roland JC120 - Split Line Out for Stereo?
« Last post by Jazz P Bass on July 29, 2021, 12:57:51 AM »
"What would happen if I leave it out?"

You will not have a proper 'voltage divider' circuit.
6
Amplifier Discussion / Re: Roland JC120 - Split Line Out for Stereo?
« Last post by vin97 on July 28, 2021, 11:54:21 AM »
Nice, thanks!
Will have to see if I have a 100 ohm resistor around.
What would happen if I leave it out?
7
Honey Amp / Re: Thoughts on my new Honey Amp
« Last post by Jazz P Bass on July 28, 2021, 11:45:33 AM »
" No power switch, but I can understand the omission, since this is supposed to be highly customizable. I have to pop the battery connectors to power down, but my enclosure choice makes that easy enough"

You could try a 3 prong switching jack that disconnects the battery ground when no cord is inserted.

Like pedals use.
8
Amplifier Discussion / Re: Roland JC120 - Split Line Out for Stereo?
« Last post by Jazz P Bass on July 28, 2021, 11:28:34 AM »
The Line Out circuit uses 2 47K and 1 100ohm resistors for the summing network.
You can disconnect R155 and add a 100 ohm resistor to ground to get a separate feed.
9
Honey Amp / Thoughts on my new Honey Amp
« Last post by mckayprod on July 28, 2021, 11:21:32 AM »
I just built mine over the weekend, and I want to start by saying "thanks" for adding a project to all the conversations and information on the forum.  This is a good way to bring it all together and stimulate more discussion.

Next, stuff I like: Excellent board, quality components...real pro stuff and I appreciate that. The distortion sound is smoother than I expected, especially on the higher-gain end of the tone range. The tone control mellows out any fizziness which could be a problem depending on your guitar/headphones/speaker.

And, my criticisms: Too much distortion, and not enough volume with the gain turned down to the edge of breakup.  I'll modify it to the clean buffer preamp option one of these days. No power switch, but I can understand the omission, since this is supposed to be highly customizable. I have to pop the battery connectors to power down, but my enclosure choice makes that easy enough. Finally, what can you say about the lack of volume from a LM386 that hasn't been said before?  I'm running two 9v in series for +18-ish volts, and this is sufficient for headphones, but just.  I haven't tried a speaker yet.

That's my experience, and I look forward to more SSGuitar projects and discussions!
10
Amplifier Discussion / Roland JC120 - Split Line Out for Stereo?
« Last post by vin97 on July 28, 2021, 07:49:26 AM »
Hello.

I have a 76 JC120 and it only has a mono line out, where both outputs are merged at the jack.
Can I just solder them to separate jacks or could this cause problems for the power amps?
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