Implementing the D'Lite Super mod kit?

[Mark]

Dear Tom

Try this, remove the 4.7K (in a temporary way) and get a 2.2K resistor and a 25K pot.

Play guitar at the volume level that you use the amp at (or want it to sound it's best at) and get someone to adjust the pot slowly. You'll have to take into consideration any changes in gain, but listen to where the tone sounds best.

The role of the feedback resistor is to provide damping, if you have two 65 watt Celestions and you're driving them with a 100 watt amp you'll need greater damping, if you're using a 22 watt amp, you may not need any damping at all. Likewise if you use the amp at bedroom volume levels you won't need much damping, but if you are using it at the top of it's limit you'll need more damping.

I am repeating myself, but the choice of the feedback resistor value isn't a firm value. While component values in the tone stack are firm values.

It's all food for thought.

[Structo]

Initially it had a 6K2 in there, so one day while I had it apart I put the 4K7 in it.
To tell you the truth, I'm not sure I heard a difference.
But it could be like you said, if I played it turned up to the "disturb the neighbors" volume I may have heard the difference.

Mostly I play at loud bedroom levels. I'm not currently gigging out, nor does it look like I will anytime soon.

I would probably be surprised at how bad it cut through a mix if I ever do since this amp has high plate resistors on both preamp tubes so it's not too bright.
But it's fun to rock out with a drum machine or backing track for now......

[heisthl]

Best to engage the bright switch when evaluationg presence circuit changes.

[Mark]

Dear Tom

I sat down and worked out the voltage at the output of the amp and the resistor value to provide the same feedback signal as a Dumble amp.

The resistor would have to be 2.7K, I put it on a switch and it sounded terrible, the amp sounded sterile. As oposed the the 6.2K value which sounded lively. This was done at a bit over bedroom playing levels, so maybe things might have been different if the amp was pushing out serious air.

I also though that the amp did have a buzzy/fuzzy quality when played at bedroom levels with my Danelectro DC-59. I did try the amp at rehearsal levels with the chaps using a guitar with humbuckers (a bright guitar) there was no buzziness and the amp sounded great.

I can understand mods such as Gil Ayan one where a cap and resistor to ground are placed on the level pot of the overdrive. The amp does become brighter sounding when the the overdrive is kicked in.

So maybe your amp wouldn't be so bad with the band.

I think the entrance mod would be quite helpful if you had a fat sounding Les Paul, I wouldn't both with it if you owned a Fender or PRS.

I'll keep posting my findings and questions as some resolution might come from it rather than carrying out mods that worked for someone else. After all who is to say that we are using the same speakers/cab, guitars/pickups and effects.

[Structo]

Yes and it is all so very subjective anyway but I appreciate your experimenting.

Somewhere along the line, I forgot what amp you have?

It was a D'Lite 44?

I can't remember if I mentioned it to you but I installed a Prosonic OT that seemed to beef up the output a lot.

[Mark]

Dar Tom

The amp is the 22/33ODE. So you replaced the Heybour transformer which originally had a 8K primary with the Vibrolux core?

What was the differences with the Prosonic output transformer, what was the primary impedance?

When you say it beefed the output a lot, is that to say you had increased output from the amp, or the sonic performance was altered?

[Structo]

Not sure of the actual primary impedance but it said it was for a push pull 2x 6L6 application. 50 watt tranny.
Somebody here recommended it.
I never ran 6V6's in my amp. At first I had the primaries on a DPDT switch but then it got in the way so I took it out.
It's probably in the 4K-5K range.
It has 4, 8, 16 ohm taps.

It's like three times larger than the one I took out.

It's been a couple months since I made the switch so the differences aren't as fresh in my mind but, I'm not sure if it's louder, it may be since it is probably more efficient but I just remember when I hit the first chord I thought wow, that's big.

A lot fuller in tone is probably the best descriptor I can use, bigger, not as a saturated tone as the smaller OT.
But some guys like that earlier breakup tone.

[Mark]

I just thought I'd bump this one back up.

As I understand it, the Super Mod kit has all the parts for all mods to the D'Lite amp.

I can't but help think that you couldn't implement all mods to the amp. If you decide to go the HRM route the OD entrance mod isn't going to much use to you.

Then there is the question of which mods do you do first and where do you go from there?

What I'm after is a method rather then blindly implementing a whole lot of mods. To my way of thinking that doesn't sense nor do you know what happened to the tone of the amp or which mod you may not like.

Anyway, I'm sure I'm repeating myself.

[Mark]

This post can be deleted, I had an error message and thought my original message was lost in cyber space somewhere.