'69 100w Super Lead between SL/A10500 thru SL/A10800 ?

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Re: '69 100w Super Lead between SL/A10500 thru SL/A10800 ?

Postby coony on Tue Oct 06, 2015 4:22 pm

Tazin wrote:That voltage chart is from about five years ago. As to why the grid voltage at pin #2 of V3 was low; I don't know for sure but it may have to do with how the tone controls are set when the voltages are taken. The voltages were taken after I biased up the amp. I use the 1 ohm resistor cathode method and shoot for 17 watts of dissapation at idle. I use a dummy load (either a 16 ohm 300w resistor or a Hotplate set to 'Load') when I bias amps. In addition, I set the tone controls either to 0 or sometimes to 10, but the volume(s) are always at 0. On the original voltage chart I have 34ma written down as the current draw per output valve.....And that works out to 17 watts per valve when you do the math.
No pictures yet?


Image

Image

More in this album!
http://s844.photobucket.com/user/koen_p ... per%20lead

As you can see, there are quite some parts changed! Still, it sounds amazing!!
play 'em loud !
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Re: '69 100w Super Lead between SL/A10500 thru SL/A10800 ?

Postby Tazin on Tue Oct 06, 2015 8:34 pm

Yeah, there are some changed componets, but at least they used quality stuff and did a tidy job.
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Re: '69 100w Super Lead between SL/A10500 thru SL/A10800 ?

Postby fendur on Sat May 07, 2016 2:33 pm

Came across this thread and realized I have SL/A 10801.....Purple w/Flat Lip box


Pix to follow
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Re: '69 100w Super Lead between SL/A10500 thru SL/A10800 ?

Postby gianbirra on Thu Nov 10, 2016 9:04 pm

Jimmy82 wrote:
I spent tens of hours searching any info of this amp.
Actually the best replica I have ever heard is Royal MSG100 with KT88. I believe that it was USA version of Super Lead 1959 with 6550(KT88) with higher negative voltage bias (-51v). This replica is with laydown transformer. Also Jimmy’s amplifier had a third switch next to “on” and “standby” switches. But I am not sure about V1b cathode resistor and other possible circuit differences.




Hi guys
I'm also very interested at the Royal MSG but in version 50W and I would get exactly the tone of the Royal MSG.
I own a '69 Plexi Metroamp specs with KT88, 0,022 mustard caps,bright cap 100pF and 47K NFB resistor connected at 8 ohm tap.
Do you have mods to suggest me?

Obviously I have a Les Paul with PAF replica on neck and T-Top replica on bridge position. :D
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Re: '69 100w Super Lead between SL/A10500 thru SL/A10800 ?

Postby Jimmy82 on Wed Sep 06, 2017 10:59 am

Hi all.
Found some interesting video, especially useful for DIY. (use 1080p to see well the table)
https://www.youtube.com/watch?v=e82Hg49zB7k
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