Thanks for your reply. I am already aware of all of what you said, and I have already read his entire website. All I need to know is whether or not the SSE boards are still available and whether or not it is still a viable project (regarding component availability). The SSE is many years old now. I am not one to send $50 USD without knowing all the facts.
A simple "Yes" from George isn't that much to ask, is it?
Yes, it's frustrating, but you have to realize that this ain't his full-time job.
After I receive all the parts from a kit I bought before Christmas, I'll tell you about spending a lot more than $50 for a kit (from a full time vendor) in mid-November, and I still haven't received everything. No delay in accepting my money...
I built my SSE last summer, so I can assure you it is a viable project, and all components are readily available. A friend recently ordered 4 boards from Tubelabs and had them within a week.
After I receive all the parts from a kit I bought before Christmas, I'll tell you about spending a lot more than $50 for a kit (from a full time vendor) in mid-November, and I still haven't received everything. No delay in accepting my money...
I built my SSE last summer, so I can assure you it is a viable project, and all components are readily available. A friend recently ordered 4 boards from Tubelabs and had them within a week.
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I know, but it's impossible when the only internet source available (Comcast) is down, and my cell phone has no coverage at the house when it's raining, and limited coverage when it's not. I live out of town in hill country so there is no cell service, or TV and very limited radio signals.
Our cable TV, phone and internet company loves to charge $250 per month but they system is old, hasn't been upgraded in at least a decade or two, and they refuse to clear the trees and junk from their lines, so stuff breaks nearly every time we have a storm. It's often days to get it fixed, and then it's not done right.
I got the order and it will be mailed today.
Cogitech- Here are a couple photos of Jack E's SPP I helped him build. The chassis is made from laser cut acrylic. Top and bottom are 1/2" thick and the sides are 1/4" thick. The posts/columns were turned on a lathe and the holes drilled and tapped on a milling machine from 3/4" diameter aluminum.
Attachments
Hum with different 2A3 brands
Dear TSE-enthusiasts,
This weekend I finished my TSE-II (still on bread board) and tried different 2A3 tubes, that I have, with this sweet sounding but powerful amplifier:
- Chinese 2A3
- Sovtek monoplate 2A3
- JJ 2A3-40
I'm using a 10 H choke and the filter capacitors as per schematic, rectifier tube is a NOS 5U4G (RCA).
The amp is connected to open baffle speakers which a very sensitivity of 98 dB. Only with the Sovtek 2A3 there is no audible hum from the sitting position (...and even with my ear close to the speaker).
What are your findings regarding hum?
Best regards
Peter
Dear TSE-enthusiasts,
This weekend I finished my TSE-II (still on bread board) and tried different 2A3 tubes, that I have, with this sweet sounding but powerful amplifier:
- Chinese 2A3
- Sovtek monoplate 2A3
- JJ 2A3-40
I'm using a 10 H choke and the filter capacitors as per schematic, rectifier tube is a NOS 5U4G (RCA).
The amp is connected to open baffle speakers which a very sensitivity of 98 dB. Only with the Sovtek 2A3 there is no audible hum from the sitting position (...and even with my ear close to the speaker).
What are your findings regarding hum?
Best regards
Peter
B- voltage measure
Hi here
While getting closer, i stumbled about where to meassure the B- voltage at the TSEII, While there is none R7 on this board, where can i meassure it then ? (At anode D2/D3 to GND perhaps???)
Rgds; Jesper.
https://www.diyaudio.com/forums/attachments/tubelab/762843d1560479028-14-run-tse-die-tse_ii_schematic-pdf
Hi here
While getting closer, i stumbled about where to meassure the B- voltage at the TSEII, While there is none R7 on this board, where can i meassure it then ? (At anode D2/D3 to GND perhaps???)
Rgds; Jesper.
https://www.diyaudio.com/forums/attachments/tubelab/762843d1560479028-14-run-tse-die-tse_ii_schematic-pdf
Hi here
While getting closer, i stumbled about where to meassure the B- voltage at the TSEII, While there is none R7 on this board, where can i meassure it then ? (At anode D2/D3 to GND perhaps???)
Rgds; Jesper.
https://www.diyaudio.com/forums/attachments/tubelab/762843d1560479028-14-run-tse-die-tse_ii_schematic-pdf
...connection between R6 and C7 to ground
The first TSE I built was with 45's for headphone use with 5K:32 opt's.
With Sennheiser HD650 there was audible (annoying) hum due to power supply ripple when nothing playing.
This was a combination of high sensitivity (103db/1V), close proximity to the driver (headphones :/), less winding ratio (1:12.5 vs 1:25), and a smallish C4 (was 4.7uF for target ~300V B+).
In this case, I replaced the choke (Hammond 159P 10H) with a HV voltage regulator (and increasing C4 to 47uF) and this solved the issue.
I'm close to finishing my second TSE with 300B's. In a temp. enclosure with ISO LC-10-200D 10H choke, 47uF filter cap, connected to 97.5 db/1W Klipsch speakers there is no hum and it is entirely silent.
Sorry I was impatient, George. I appreciate your response and quick action getting the board sent out.
Very unique! I am a long way off from making any decisions about chassis design/build, so it will be great to see as many as possible so I can choose something that I a) can do a decent job building, and b) will be attractive enough. I've built some pretty ugly amps and DACs over the years (cookie tin chassis, plywood, etc.) - time to change that.
Meassure bias 300b on the TSEII
Hi again.
Have one more quistion, also regarding the checkout procedure.
This snippet is from the tubelab.com site
I cannot figure out why the reading on the voltmeter say 0.65 is the same as 65mA. - I suppose that there is not 650v / 10ohm on the R18/R29 resistors
Rgds; Jesper.
Hi again.
Have one more quistion, also regarding the checkout procedure.
This snippet is from the tubelab.com site
I cannot figure out why the reading on the voltmeter say 0.65 is the same as 65mA. - I suppose that there is not 650v / 10ohm on the R18/R29 resistors
Rgds; Jesper.
if you can use bigger heatsink and have room, go for it. i have TSE-1 and all have big heatsink, very happy with it.
