Time to be a pest again - C4S for the SEX 2.1?
- Thread starter Todd R
- Start date
Hello Todd,
The manual should be wrapped up shortly (we were delayed by needing a custom piece of hardware), hopefully Josh can chime in on how it's going.
-PB
The manual should be wrapped up shortly (we were delayed by needing a custom piece of hardware), hopefully Josh can chime in on how it's going.
-PB
randy@matrixq.com
New member
I plan on ordering as soon as one is available.
Wormwood said:
Essentially, the C4S will present the ideal load to the driver half of the 6DN7, increasing the gain a bit, and lowering the distortion of that stage. As a side benefit, the C4S also presents a high impedance between the driver and the power supply, granting some noise reduction.
There's some decent reading on the subject here:
http://www.pmillett.com/current_source.htm
Though it is good to keep in mind that our C4S circuit is purpose-built for high voltage tube apps (some have found the IXYS chips to be a bit flaky).
-PB
fullheadofnothing
Moderator
Sorry, I just saw this one. So here's what's going on with manuals: I've gotta get the Bottlenects manual done first, since those kits are already arriving for people (photos and most of the writing is done). Then I need to build, shoot, write, and layout the C4S S.E.X. 2.1 manual. I have tomorrow off, so my goal is to have a functioning C4S'd S.E.X. by tomorrow afternoon and be listening to it while I write. Overall, I think the manual should be done by next weekish, barring unforeseen delays.
If you run into any hangups, I'll be at home working too, and Doc B. has a working SEX with C4S on the workbench.
We are here for you buddy
We are here for you buddy
tuffy_puppy
New member
hi, i am really confused here. when i ordered my sex 2.1 assembled by shawn at bottlehead a year ago i, just as a matter of course, had the c4s upgrade installed because i thought this issue was settled. this upgrade was one that everyone would want. i assumed we all knew that. now i see that the discussion about this matter is ongoing. the comments about this matter seem to be recent. why? we all know this is an upgrade that is desirable. at least i thought so. please enlighten me. don
Paul Joppa
Moderator
The manual to install the C4S has to be different because version 2.1 is different and looks different in the pictures. Since we're re-doing it anyhow, the latest C4S board will be used, which is also slightly different. The C4S in the catalog right now is for version 2.0. As often happens, we underestimated how long it would take to make a simple revised manual...
The same goes for upgrading to the version 2.1 output transformers and plate chokes, incidentally. This is not the same as buying Magnequest plate chokes and output transformers, which are still available and work for either version; we don't have a manual for either amp version but the change is much simpler in that case - fewer connections.
Since Shawn built yours, with Doc B looking over his shoulder, he din't need no stinkin' manual! You have a pre-production, semi-custom amp.
The same goes for upgrading to the version 2.1 output transformers and plate chokes, incidentally. This is not the same as buying Magnequest plate chokes and output transformers, which are still available and work for either version; we don't have a manual for either amp version but the change is much simpler in that case - fewer connections.
Since Shawn built yours, with Doc B looking over his shoulder, he din't need no stinkin' manual! You have a pre-production, semi-custom amp.
tuffy_puppy
New member
well bein' simpleminded does this mean i am hosed up or i am i good to go? my li'l amp and it's li'l foreplay 3 sound awful good but if it could sound better i'm in that game too. yuh know what i mean? don
Grainger49
New member
Your C4S boards are there and professionally installed. You are in high cotton!
You also have a version of the amplifier no one else has at the moment.
You also have a version of the amplifier no one else has at the moment.
Photos are finished as of about 10 minutes ago. The text for the manual is written, so it's just a matter of photo editing and a little rearranging, then we are ready to ship.
We set a deadline of this Friday for manual completion, which means shipping early next week.
-PB
We set a deadline of this Friday for manual completion, which means shipping early next week.
-PB
Similar threads
