S.I.R. 100W SuperLead Schematic pt. II

[clau_978]

There is a layout for #35 here http://www.ceriatone.com/hot-rodded-plexi-afd-35-100/

Hello, thanks for answering
I have this layout, but not how to use it, I do not know much about electronic
I was thinking of trying to agree what he says above in the post (in the pdf)
Something like this https://www.youtube.com/watch?v=bdTPyOmkFHE
But anyway, if you have a layout or you can do something for make it easier (add this, remove that)
...I appreciate it

There is no easier way than this. If you're having a hard time understanding a layout which is basically "paint by numbers" you should get some professional to help you or learn.

Hi,

I understand the layout, but I do not know how much more I have to modify my jcm 800
I want to add a valve (to get the soundand) and footswitch
Thanks

[clau_978]

There is a layout for #35 here http://www.ceriatone.com/hot-rodded-plexi-afd-35-100/

Hello, thanks for answering
I have this layout, but not how to use it, I do not know much about electronic
I was thinking of trying to agree what he says above in the post (in the pdf)
Something like this https://www.youtube.com/watch?v=bdTPyOmkFHE
But anyway, if you have a layout or you can do something for make it easier (add this, remove that)
...I appreciate it

There is no easier way than this. If you're having a hard time understanding a layout which is basically "paint by numbers" you should get some professional to help you or learn.

Sorry, my mistake, It is easy.
I did not see the whole layout
Sorry sorry
But now I have a problem, I do not know how to power the cables of 5v for the relay

[RagnarMarGunn]

Hello, thanks for answering
I have this layout, but not how to use it, I do not know much about electronic
I was thinking of trying to agree what he says above in the post (in the pdf)
Something like this https://www.youtube.com/watch?v=bdTPyOmkFHE
But anyway, if you have a layout or you can do something for make it easier (add this, remove that)
...I appreciate it

There is no easier way than this. If you're having a hard time understanding a layout which is basically "paint by numbers" you should get some professional to help you or learn.

Sorry, my mistake, It is easy.
I did not see the whole layout
Sorry sorry
But now I have a problem, I do not know how to power the cables of 5v for the relay

You can use the filament supply ... heaters which give 6,3v. It's done in Jubilee amps and the layout is here https://drive.google.com/drive/folders/ ... GI5bDZtRzg

[bmwfreq]

Hey guys!

I hope this post finds everyone well. it's been quite a while since I've posted here, and I'm glad to see that the #34 #36 fascination is still alive and well.

My question here is, is there a difference between placing the 220pF cap of the #34 mod across the 100K plate resistor of V1b, and placing it across pins 6 and 8 of V1b???

If there is no difference, why not? If there is a difference, why??

Thanks in advance to all that reply.

[wdelaney72]

I've started recording on Bandhub - https://bandhub.com/BRMSlash#. I've since done a few minor tweaks to my amp, nothing fancy. I'm now using MKT1813 250V 0.1uF cathode bypasses.

Sweet Child O' Mine - https://bandhub.com/s/58da9f655f107ff04301db35

Interesting tool. I haven't registered so I cannot isolate the tracks. The intro, sounds pretty damn good.

[snakepit86]

Hey guys!

I hope this post finds everyone well. it's been quite a while since I've posted here, and I'm glad to see that the #34 #36 fascination is still alive and well.

My question here is, is there a difference between placing the 220pF cap of the #34 mod across the 100K plate resistor of V1b, and placing it across pins 6 and 8 of V1b???

If there is no difference, why not? If there is a difference, why??

Thanks in advance to all that reply.

Hi man! Put the cap from grid to cathode will bypass more treble than just put the cap across the plate resistor.

[bmwfreq]

Thanks man!!!

I appreciate the helpful reply, and the specifics as to placement.

Have a good one!!

[bmwfreq]

I'm not sure if anyone here has noticed this...but there is a stock Marshall component missing from the schematic that Santiago gave us. He even went to the trouble of removing this component from the schematic he mocked up and gave back to us. I don't believe anyone here has realized this, because it has never been mentioned during this forums discussions.

I have also confirmed by viewing the the AFD100 videos of the front panel pots that this component is in fact missing/removed...whether or not this has an effect on the outcome of the #34 mod tone will be left to you to decide...

I can't attach the schematic for your viewing. Evidently, I've reached my quota of file attachments here on the forum, so I can't attach this schematic to this post...

[BRMSlash]

I assume you're talking about the #34 mod schematic? The only thing I see missing is the 1M resistor to ground at the input. I don't think this would impact the tone much though. Also the power stage is not shown in full either, so could be something going on there.

[Roe]

which component are you referring to?

[dukeamps]

I keep getting emails about how to get the AFD tone, so here is a good spec for you all,

all 22n couplers

Stage 1,
2k7.68u 470p470k 5n 220k on pot, shieldtrick, 220p over first plate.

Stage 2,
2k7.68u 1ma pot,

Stage 3, 10k, 470k470k470p, 470p over plate

Stage 4, 820r .47u

TS 470p33k

NFB, 100k 4ohm .68u

Cheers

[pjoliver182]

BMWfreq Santiago didn't leave it out of the AFD100 though - curious...

[snakepit86]

I keep getting emails about how to get the AFD tone, so here is a good spec for you all,

all 22n couplers

Stage 1,
2k7.68u 470p470k 5n 220k on pot, shieldtrick, 220p over first plate.

Stage 2,
2k7.68u 1ma pot,

Stage 3, 10k, 470k470k470p, 470p over plate

Stage 4, 820r .47u

TS 470p33k

NFB, 100k 4ohm .68u

Cheers

Guys, please try to do your homework. Here we are since YEARS soldering and desoldering, reading and searching. No one here will give any single more clues until we see any work and searching of any new member. My thinks....

About the #34 the afd100 has some strange arregements due to the halfs 12ax7 that left unused.

[bmwfreq]

BMWfreq Santiago didn't leave it out of the AFD100 though - curious...

You're right. This component was not omitted from the AFD100 even though it was removed from the #34...but why would Santiago, Marshall or Slash care, when they never attempted to emulate the #34 in the AFD100 (this is a direct quote from Santiago himself.)

The component that was removed was the 4.7K resistor from the presence pot. It does affect the overall tone of the #34 mod, and does add an element that is needed to achieve a correct #34 tone.

Someone said the 1M resistor nearest the input jacks was removed??? I've combed over many screen shots of the AFD R&D videos, and this is not something I was able to discern. How do we know the 1M resistor was removed, and if it was, why? I can't imagine the removal of the 1M resistor would have any affect on the #34 mod outcome. If it does, can someone tell me how and why??

Thanks in advance...

[Roe]

removing the 4k7 will increase the NFB. Removing the 1m isn't a good idea, although you might try 2m2 instead for a slightly brighter and hotter signal (it is similar to increasing the value of the volume pot in your guitar if you plug straight into the amp)