Fugly!
(though, more porn, the merrier)
yep, not the ever and allways boring rectangular casings
Zen Mod , just for you !
Transgender demonstrates Zenith table radio restoration - Democratic Underground
Transgender demonstrates Zenith table radio restoration - Democratic Underground
as allways ...thanks ZenMod for your time and answer.
i have allready a two variacs for starting each X-Soz.
the thought behind is, that Nelson says, that X-Soz sounds best at 40V supply rails.
for trying that out, i have to build a bigger version of X-Soz
i wish to avoid buying big resistors and expensive heatsinks
thats the reason for my question.
do i have to await for issues, when the resistors of light bulb changes, when it get hot?
i have allready a two variacs for starting each X-Soz.
the thought behind is, that Nelson says, that X-Soz sounds best at 40V supply rails.
for trying that out, i have to build a bigger version of X-Soz
i wish to avoid buying big resistors and expensive heatsinks
thats the reason for my question.
do i have to await for issues, when the resistors of light bulb changes, when it get hot?
dunno, you need to point me to Papa's post where he sez that, so I can figure out is 40V only change, Iq staying the same ?
anyway - you need to project voltages at drains and Iq, and rail voltage
say that you want to keep 8R loading resistance
then you "just" need to figure out how to arrange group of bulbs , having 8R at desired Iq
for that you don't need amp circuit - all you need is Variac and hefty xformer with rectifier, V meter and I meter
anyway - you need to project voltages at drains and Iq, and rail voltage
say that you want to keep 8R loading resistance
then you "just" need to figure out how to arrange group of bulbs , having 8R at desired Iq
for that you don't need amp circuit - all you need is Variac and hefty xformer with rectifier, V meter and I meter
its here:
Zen Variations 6 | Pass DIY
he wrote:
Compared to the Zen Lite, it depended on the bias conditions. I used a Variac to go between the two 30V and 40V settings, and at the higher bias, it definitely was better than Zen Lite and approached the Aleph 30 for dynamic range, and I would say matched it overall on most material. Unfortunately, at 40 volt rails and 4 amps bias per transistor (640 watts/ch dissipation), it ran hot as hell, and my heat sinking was not up to the job over long periods. As a result, quite a bit of the time was spent at the lower settings. Alas, the lower setting is slightly inferior, and it’s quite easy to get spoiled. This was true of the original SOZ as well, so some things just don’t change.
best
and yes, i have to try it out, using volt and amperemeter
i think i use those halogen sticks, because the are smaller
Zen Variations 6 | Pass DIY
he wrote:
Compared to the Zen Lite, it depended on the bias conditions. I used a Variac to go between the two 30V and 40V settings, and at the higher bias, it definitely was better than Zen Lite and approached the Aleph 30 for dynamic range, and I would say matched it overall on most material. Unfortunately, at 40 volt rails and 4 amps bias per transistor (640 watts/ch dissipation), it ran hot as hell, and my heat sinking was not up to the job over long periods. As a result, quite a bit of the time was spent at the lower settings. Alas, the lower setting is slightly inferior, and it’s quite easy to get spoiled. This was true of the original SOZ as well, so some things just don’t change.
best
and yes, i have to try it out, using volt and amperemeter
i think i use those halogen sticks, because the are smaller
Last edited:
well, it looks that Pa simply increased PSU voltage, thus also increasing Iq
no other way than to plat with bulbs ....... contrary to fixed resistors, they will change resistance with both rail voltage and Iq
besides being flashy for eyes, sole benefit of using bulbs is that you need less to invest in heatsinking, but you're compensating that with time invested in chasing magic combo of Iq, rails,number of bulbs, type of bulbs ........
no other way than to plat with bulbs ....... contrary to fixed resistors, they will change resistance with both rail voltage and Iq
besides being flashy for eyes, sole benefit of using bulbs is that you need less to invest in heatsinking, but you're compensating that with time invested in chasing magic combo of Iq, rails,number of bulbs, type of bulbs ........
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.