Tweed Dee Deluxe

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M Fowler
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Tweed Dee Deluxe

Post by M Fowler »

MC 40-18021 PT 710vct
MC 40-18022 OT

One thing I need to do is get a 10k trimmer I used 20k because the 10k I ordered was a small square one I didn't want to use. I'll get the correct trimmer.

Will post voltage chart soon. Plates 405 Screens 381

Mark
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Aaron
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Re: Tweed Dee Deluxe

Post by Aaron »

Very nice Mark. What JJ 12AX7's do you use? I bought some and the gain was so high on them it was making my amps unstable.

Aaron
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M Fowler
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Re: Tweed Dee Deluxe

Post by M Fowler »

Aaron wrote:Very nice Mark. What JJ 12AX7's do you use? I bought some and the gain was so high on them it was making my amps unstable.

Aaron
Aaron thank you, I use ECC83 $9.00 type. I am going to get some NOS from my friend to use in this amp.

Mark
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M Fowler
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Re: Tweed Dee Deluxe

Post by M Fowler »

Voltage Chart attached, I gleaned expected voltages from Charlie's posts.

I need to get a 10k trimmer pot because voltage is off V2-P8: 54vdc

3k5 to .1uf cap but has 18k to the 56k series resistor and 15k to junction of 4k7/1M on the trimmer.
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lovetone
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Re: Tweed Dee Deluxe

Post by lovetone »

Nice build, look's great.

Whats the tone like?
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M Fowler
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Re: Tweed Dee Deluxe

Post by M Fowler »

lovetone wrote:Nice build, look's great.

Whats the tone like?
Thank you, the tone is smooth with some breakup and plenty of volume but I do need to get the 10k trimmer installed and then listen again.
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martin manning
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Re: Tweed Dee Deluxe

Post by martin manning »

M Fowler wrote:I need to get a 10k trimmer pot because voltage is off V2-P8: 54vdc

3k5 to .1uf cap but has 18k to the 56k series resistor and 15k to junction of 4k7/1M on the trimmer.
Looks nice, Mark! Maybe put a 47k in place of the 56k for a quick fix? Or, better yet, parallel a 270k with it to get even closer. I see you've got a little difference in the filtering there too with 3x 47uF instead of 3x 33uF, and 20uF instead of 33uF for V1.
Aaron
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Re: Tweed Dee Deluxe

Post by Aaron »

I've noticed that the amps that have been built still use the 56k - 33k series resistors in the PI. Has anyone tried a single resistor?

Aaron
CHIP
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Re: Tweed Dee Deluxe

Post by CHIP »

Nice build Mark.
My preamp voltages came in really close to the ones posted on Charleys drawing, but the power amp voltages come in about 30 vdc lower, so if I would put in a PT with higher output, my pre amp voltages would increase too.
Then the second dropping string resistor would have to be raised.

Just bringing up something others may consider if building a Tweedle Dee.
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jelle
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Re: Tweed Dee Deluxe

Post by jelle »

Nice build!!

BTW, I spoke with a builder a few days ago who told me that he tried the output transformer you used, and it did not live long when used with the high power JJ 6V6 tubes.

I would hate to see you lose perfectly good beer money on smoke.

But in all honesty, I am curious to hear if it lives, as the alternative is a pro OT and this will change the amp.

Did you dime it for a while yet?
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M Fowler
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Re: Tweed Dee Deluxe

Post by M Fowler »

Looks nice, Mark! Maybe put a 47k in place of the 56k for a quick fix? Or, better yet, parallel a 270k with it to get even closer. I see you've got a little difference in the filtering there too with 3x 47uF instead of 3x 33uF, and 20uF instead of 33uF for V1. MManning
Martin thank you, I have the 10k trimmer coming so I'll swap it out but thanks for the advice always appreciated. :)
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M Fowler
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Re: Tweed Dee Deluxe

Post by M Fowler »

CHIP wrote:Nice build Mark.
My preamp voltages came in really close to the ones posted on Charleys drawing, but the power amp voltages come in about 30 vdc lower, so if I would put in a PT with higher output, my pre amp voltages would increase too.
Then the second dropping string resistor would have to be raised.

Just bringing up something others may consider if building a Tweedle Dee.
Chip thank you, I wrote down your voltages, Tonemerc's, and Charlie's before making my voltage chart. We all have different transformers basically. I think my voltages will work though.
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M Fowler
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Re: Tweed Dee Deluxe

Post by M Fowler »

jelle wrote:Nice build!!

BTW, I spoke with a builder a few days ago who told me that he tried the output transformer you used, and it did not live long when used with the high power JJ 6V6 tubes.

I would hate to see you lose perfectly good beer money on smoke.

But in all honesty, I am curious to hear if it lives, as the alternative is a pro OT and this will change the amp.

Did you dime it for a while yet?
Jelle thank you, I did crank the amp up to full volume on both channels running through a 212 Dumble cab with EVM12L's nice. :) Melt down might occur but against your advice I'm sticking with it :lol: Thanks for the Pro OT advice.
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M Fowler
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Re: Tweed Dee Deluxe

Post by M Fowler »

On the four input jacks I isolated them and ran their ground to a tab on the right.

I used 1m on the high inputs for each channel for strats/tele and 180k for each low input for Humbucker guitars.

Have no noise or hum which is so nice when you have such tight chassis space.

I did not have any 33uf caps left, which shocked me because I swore I did, maybe they'll show up later. :lol:

I wish I would have thought this out sooner and had put two 33k resistors on the board instead of just one for the mic input jacks. No problem if your using a 5C3 three input chassis but with four input jacks that extra 33k would have been nice.

Almost forgot to mention I did not have a 110k plate resistor so I used a 121k that measured low and that could be replaced at some point too.

Mark
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jelle
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Re: Tweed Dee Deluxe

Post by jelle »

M Fowler wrote:
jelle wrote:Nice build!!

BTW, I spoke with a builder a few days ago who told me that he tried the output transformer you used, and it did not live long when used with the high power JJ 6V6 tubes.

I would hate to see you lose perfectly good beer money on smoke.

But in all honesty, I am curious to hear if it lives, as the alternative is a pro OT and this will change the amp.

Did you dime it for a while yet?
Jelle thank you, I did crank the amp up to full volume on both channels running through a 212 Dumble cab with EVM12L's nice. :) Melt down might occur but against your advice I'm sticking with it :lol: Thanks for the Pro OT advice.
Nice, I'll get some of those too. :D
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