Author Topic: My Tube Journey  (Read 198663 times)

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Offline JojoD818

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Re: My Tube Journey
« Reply #1020 on: Feb 11, 2018 at 10:26 PM »
hope this ac power loss detector can help in their future iterations.



the pnp transistor can be any small signal types. I see they use the 2N5401, that should work well. AC1/AC2 is tapped at the main transformer's secondary directly. when power is turned off, C6 (100uf cap at the junction of R10/R11) is immediately discharged to ground through D3, R3 and T1.

now, if you don't want to mess too much with the stock board (I know I wouldn't), another way to increase your turn off speed is as I mentioned above to reduce C5 to about 47uf, then parallel a diode (1N4148 or 1N4007 will do, or whatever is laying around) with R10. this will provide a discharge path for C6 (the turn-on delay capacitor) during turn off and will tremendously improve the cut off time of the relay. ;)


Offline tony

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Re: My Tube Journey
« Reply #1021 on: Feb 12, 2018 at 06:11 AM »
thanks jojod...our second batch of boards are happening first week of march and we can incorporate your inputs...now at 60 boards spoken for...

« Last Edit: Feb 12, 2018 at 06:14 AM by tony »
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline JojoD818

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Re: My Tube Journey
« Reply #1022 on: Feb 12, 2018 at 08:36 AM »
cool... hope it helps.

Offline tony

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Re: My Tube Journey
« Reply #1023 on: Feb 19, 2018 at 08:09 AM »
ST70 mundorf cap upgrades....caps were around 270 pesos each

before upgrade...


after...
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline parasound

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Re: My Tube Journey
« Reply #1024 on: Feb 19, 2018 at 02:13 PM »
Nice upgrade sir, KT66 ba yun naka lagay?


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Offline tony

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Re: My Tube Journey
« Reply #1025 on: Feb 19, 2018 at 02:25 PM »
Nice upgrade sir, KT66 ba yun naka lagay?


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yes...
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline parasound

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Re: My Tube Journey
« Reply #1026 on: Feb 19, 2018 at 02:57 PM »
Good choice, mas gusto ko ang bass ng kt66/6l6 compare sa el34 ng ST70 ko, with correct bias setting.


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Offline tony

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Re: My Tube Journey
« Reply #1027 on: Feb 19, 2018 at 03:24 PM »
my observations too...
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline tony

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Re: My Tube Journey
« Reply #1028 on: Mar 02, 2018 at 06:21 PM »
diy power cord.....honest to goodness gage#14 3 cored stranded  cable with molded plug from Deeco and Roks in Raon and hubble like plugs from Narayan...

how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline tony

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Re: My Tube Journey
« Reply #1029 on: Mar 11, 2018 at 11:12 AM »
freshly made, a 6SN7 line amp with ss phono stage....2 line inputs, an MM phono head, and two sets of line out...



how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline tony

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Re: My Tube Journey
« Reply #1030 on: Mar 13, 2018 at 08:56 AM »
bro. Cal, this might interest you, i made it just for you.... ;)

Quote
yet another variation of the 6BC4 line amp, this time a bit more B+ and a beefier power supply...OP about 90 volts dc and 10mA...a high transconductance tube with a strong cathode..



how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline tony

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Re: My Tube Journey
« Reply #1031 on: Apr 09, 2018 at 05:56 PM »
2A3 build #3....12gh7 triode wired CCS loaded, and JJ2A3 tube ready...CCS biasing for 60mA, makes tube rolling easy...



« Last Edit: Apr 26, 2018 at 05:24 AM by tony »
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline JojoD818

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Re: My Tube Journey
« Reply #1032 on: May 21, 2018 at 05:55 PM »
Hi Tony, I got na the used RCA jacks. Good for practice material. Thanks!


Offline tony

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Re: My Tube Journey
« Reply #1033 on: May 22, 2018 at 06:03 AM »
Hi Tony, I got na the used RCA jacks. Good for practice material. Thanks!



you are welcome jojo.....
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline jerix

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Re: My Tube Journey
« Reply #1034 on: May 31, 2018 at 07:05 AM »
2A3 build #3....12gh7 triode wired CCS loaded, and JJ2A3 tube ready...CCS biasing for 60mA, makes tube rolling easy...





Kuya how much if you sell this? im just asking and it seems im interested...
Samsung65MU6303/TCL4kPS49TV/OnkSR608/OnkTXNR676/Marantz/Akai/Sansui/PrjEssential-II

Offline tony

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Re: My Tube Journey
« Reply #1035 on: May 31, 2018 at 10:02 AM »
Jerix, not for sale at this time....amps like this are in the 45k peso range...
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline jerix

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Re: My Tube Journey
« Reply #1036 on: May 31, 2018 at 10:22 AM »
^thanks po! im looking for an entry level item around 20k maybe.
Samsung65MU6303/TCL4kPS49TV/OnkSR608/OnkTXNR676/Marantz/Akai/Sansui/PrjEssential-II

Offline tony

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Re: My Tube Journey
« Reply #1037 on: May 31, 2018 at 02:34 PM »
^thanks po! im looking for an entry level item around 20k maybe.

i have one in the works...will advise
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Offline tetablanco

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Re: My Tube Journey
« Reply #1038 on: Aug 01, 2018 at 08:37 AM »
Happy Birthday Master Tony! :)

Offline tony

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Re: My Tube Journey
« Reply #1039 on: Aug 01, 2018 at 08:46 AM »
salamat attorney Teta, would you like to babysit the 2A3 amp? ;)
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline JoeyGS

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Re: My Tube Journey
« Reply #1040 on: Aug 01, 2018 at 11:52 AM »
Happy Birthday Sir Tony!

Offline choyb

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Re: My Tube Journey
« Reply #1041 on: Aug 01, 2018 at 05:50 PM »
Happy Birthday Sir Tony, many more to come!

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Offline tetablanco

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Re: My Tube Journey
« Reply #1042 on: Aug 01, 2018 at 07:10 PM »
salamat attorney Teta, would you like to babysit the 2A3 amp? ;)


Would be honored, Sir. :)

Offline JojoD818

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Re: My Tube Journey
« Reply #1043 on: Aug 02, 2018 at 08:37 AM »
Belated Happy Birthday Tony!

Offline tony

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Re: My Tube Journey
« Reply #1044 on: Aug 02, 2018 at 08:38 AM »
thanks Jojo and guys for the birthday greetings...
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline tony

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Re: My Tube Journey
« Reply #1045 on: Oct 26, 2018 at 10:40 AM »
happening tomorrow.....a taste of Nelson Pass, Camp Amp mosfet class A...



the kit fr4 double side boards:


the amp: powered by a 24v@5ampere smps power supply...

how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline tony

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Re: My Tube Journey
« Reply #1046 on: Jul 29, 2019 at 07:37 AM »
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline tony

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Re: My Tube Journey
« Reply #1047 on: Jul 29, 2019 at 07:38 AM »
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline tony

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Re: My Tube Journey
« Reply #1048 on: Jul 29, 2019 at 07:38 AM »
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....

Offline tony

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Re: My Tube Journey
« Reply #1049 on: Jul 29, 2019 at 07:39 AM »
how do we defend our freedom? by the truth when it is assaulted by Marcos lies....