Beautiful work! Looks like you are very meticulous and creative. You are making me jealous by saying you like it better than the Simple SE. 😛
Pictures were taken with a Canon G10.
For the umbelical, in the amp the cable has no connector, goes directly in the chassis. The cable is done with two coaxials (for B+ and B-) normal cable for grounging (shielding are connected only on PSU side) and shielded twisted pair for the AC6.3.
On the side of the PSU, I did not decide yet, as you can see the psu is still in progress. Now I connect wires one by one, I almost destroyed everything with a stupid mistake.
The idea is to try the Salas HV shunt regulator, once the PCBs are ready.
I have some connectors that look like valve sockets, I think I am going to use that.
D.
For the umbelical, in the amp the cable has no connector, goes directly in the chassis. The cable is done with two coaxials (for B+ and B-) normal cable for grounging (shielding are connected only on PSU side) and shielded twisted pair for the AC6.3.
On the side of the PSU, I did not decide yet, as you can see the psu is still in progress. Now I connect wires one by one, I almost destroyed everything with a stupid mistake.
The idea is to try the Salas HV shunt regulator, once the PCBs are ready.
I have some connectors that look like valve sockets, I think I am going to use that.
D.
Ahh very nice. In my opinion, ditch the EL34s and use some KT88s. I like the Penta labs KT88s. They have a much fuller sound with a deeper soundstage. Interesting use of a "universal" power supply. 🙂
The idea of the "universal" power supply came by chance. I live in Japan, but I will move in few years back to Europe, so I did not want to buy a bunch of 100 V power transformers, and here is very difficult to find multi voltage transformers.
The Tubelab SE uses the 5UGB as rectifier, that gives me 380 V B+. The SimpleSE uses the 5AR4 that gives me between 410 and 420 V depending on the tubes.
The PS has good components, the first cap is a 22uF Solen fastcap and the second a 200uF Film Mylar. In between a 10H 81DCR choke. I had to add the B- part to support the tubelabSE.
At the moment the B- circuit, is manually disconnected when I use the SimpleSE, I am not sure if this is really necessary. Any input ? I would love to solder it.
I am curious to see the impact of the PS on the sonic, so next I want to assemble the worst possible PS, using a 2$ bridge and cheap caps to see it my non-gifted hears can hear the difference. Next I would like to try various filters and regulators.
BR,
Davide
The Tubelab SE uses the 5UGB as rectifier, that gives me 380 V B+. The SimpleSE uses the 5AR4 that gives me between 410 and 420 V depending on the tubes.
The PS has good components, the first cap is a 22uF Solen fastcap and the second a 200uF Film Mylar. In between a 10H 81DCR choke. I had to add the B- part to support the tubelabSE.
At the moment the B- circuit, is manually disconnected when I use the SimpleSE, I am not sure if this is really necessary. Any input ? I would love to solder it.
I am curious to see the impact of the PS on the sonic, so next I want to assemble the worst possible PS, using a 2$ bridge and cheap caps to see it my non-gifted hears can hear the difference. Next I would like to try various filters and regulators.
BR,
Davide
Nikon1975 and Junior what do you have for the ouput transformer 3.5k, 5k?
What is the B+? 450 volts and the resistor for the bias ? 560k 720k?
What is the B+? 450 volts and the resistor for the bias ? 560k 720k?
hi tigrine,
Opt Tx = 1629SE (6.5k)
Configure to accept both KT88 or EL34 with Cathode Bias Resistor at 560ohm and 820ohm respectively.
Picture show EL34.
Hi Junior,
Do you use a switch to select between the two resistors?
If so, do you have photos to show it?
I have two SimpleSE. One with EL34 and the other with KT88.
I hesitate to bring together all under the same amplifier
Do you use a switch to select between the two resistors?
If so, do you have photos to show it?
I have two SimpleSE. One with EL34 and the other with KT88.
I hesitate to bring together all under the same amplifier
yes i switch between 2 resistors via a DPDT switch.
this is just one of the many ways of implementing.
the actual built picture was rather "messy" thus i had also come out with a graphical representation and hope it helps.
Moparman. Looks cool. Still planning on going to the Nationals? I think I might make it this year, probably Saturday. Missed the last two. I went several years in a row before that. It is 1200 miles away, but I have to visit my mother in law who lives in West Virginia about 100 miles east of the track. If you are going, PM me your cell phone # if you want to talk cars, amps, or whatever. My boss could still veto the time off though.
My SimpleSE
My first tube amp, and though it cost more than anticipated -- what diy project doesn't -- I think it's worth every $.01. Beautiful sound, makes my full range Fostex sing 😀
Pretty standard build, Edcor XPWR035, XPSE25-8-5K, Hammond 193J, 70uF motor run cap, .22uf Auricaps, EH-EL34, JJ-GZ34, Jan-Philips 12AT7WC.
My first tube amp, and though it cost more than anticipated -- what diy project doesn't -- I think it's worth every $.01. Beautiful sound, makes my full range Fostex sing 😀
Pretty standard build, Edcor XPWR035, XPSE25-8-5K, Hammond 193J, 70uF motor run cap, .22uf Auricaps, EH-EL34, JJ-GZ34, Jan-Philips 12AT7WC.
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