Thanks Xti16... that Octave V70SE...OMG! It's a treasure!! Germany power!
@Ghosthouse: I really appreciate your advice, I already read your post "Tube upgrades for Jolida 502B?" Thumbs Up!!!!
I need to tell you that your advice is very important, as a Jolida 502B owner...don't let it many time in the bench!
About the tubes, I was looking at the web info about the Winged SED reviews and each one said the same: very reliable tube with tight bass.
As a retired bass player, I really understand what means bass heft...so that is a very good direction to me.
I think maybe it will be interesting attach the Winged C with the Mullard's AT and Ax's... as this could represent around $350 at USA but certainly $600 after customs here in Costa Rica. Think that Winged C get me that money back for sure...
I'm trying all this days to do my homework, learning about tubes. And the Bias issue it is a big issue to me, I never hear about it until reading the topic at this forum.
So, sorry but I need to bother you Ghosthouse! and any other guy of course if has this knowledge and experience.
FYI... I don't have the manual, just a scan page that I found at polkaudio forum...weird certainly!
As I try to understand, this is the basic procedure to manual Bias a Jolida 502b:
1- Unplug the AC power cord from the Wall and replace the tubes / replace the AC power once got replaced the tubes, with God help and if Danica Patrick keep quiet without crashes...
2- Remove all the audio inputs (??) what for ? not necessary to know ? :)
3- Depress the AC power switch to OFF
4- Adjust the bias levels to the lowest setting = counter clockwise until cannot turn any further (v3, v4, v7, v8)
5- Make certain the left and right speakers cables are attached
6- Volume control at lowest setting
7- Turn On the Amp
8- Let the amp warm around 30 minutes ??
9- Get the multimeter set to D.C.V. / milivolt range setting
10- Get the 5 female jack terminal behind the Power Tubes / Black or Negative probe goes into the center terminal = #0
11- Red or Positive probe goes in the hole numbered according to the tube I want to bias (v3 correspond to hole #3, etc)
12- Starting the bias procedure by turn the relative screw via the small recessed pot closest, clockwise until 45-55 millivolts or .045 to .055 appear at the multimeter -It is true that is better set 45-46 to extend the tubes life ?
13- ?? What else ?
Sorry if my post is too confuse to read fellas...it will be my very first time as electrician and learning this stuff from english language, I'm not very good with both themes!
Thanks again!
@Ghosthouse: I really appreciate your advice, I already read your post "Tube upgrades for Jolida 502B?" Thumbs Up!!!!
I need to tell you that your advice is very important, as a Jolida 502B owner...don't let it many time in the bench!
About the tubes, I was looking at the web info about the Winged SED reviews and each one said the same: very reliable tube with tight bass.
As a retired bass player, I really understand what means bass heft...so that is a very good direction to me.
I think maybe it will be interesting attach the Winged C with the Mullard's AT and Ax's... as this could represent around $350 at USA but certainly $600 after customs here in Costa Rica. Think that Winged C get me that money back for sure...
I'm trying all this days to do my homework, learning about tubes. And the Bias issue it is a big issue to me, I never hear about it until reading the topic at this forum.
So, sorry but I need to bother you Ghosthouse! and any other guy of course if has this knowledge and experience.
FYI... I don't have the manual, just a scan page that I found at polkaudio forum...weird certainly!
As I try to understand, this is the basic procedure to manual Bias a Jolida 502b:
1- Unplug the AC power cord from the Wall and replace the tubes / replace the AC power once got replaced the tubes, with God help and if Danica Patrick keep quiet without crashes...
2- Remove all the audio inputs (??) what for ? not necessary to know ? :)
3- Depress the AC power switch to OFF
4- Adjust the bias levels to the lowest setting = counter clockwise until cannot turn any further (v3, v4, v7, v8)
5- Make certain the left and right speakers cables are attached
6- Volume control at lowest setting
7- Turn On the Amp
8- Let the amp warm around 30 minutes ??
9- Get the multimeter set to D.C.V. / milivolt range setting
10- Get the 5 female jack terminal behind the Power Tubes / Black or Negative probe goes into the center terminal = #0
11- Red or Positive probe goes in the hole numbered according to the tube I want to bias (v3 correspond to hole #3, etc)
12- Starting the bias procedure by turn the relative screw via the small recessed pot closest, clockwise until 45-55 millivolts or .045 to .055 appear at the multimeter -It is true that is better set 45-46 to extend the tubes life ?
13- ?? What else ?
Sorry if my post is too confuse to read fellas...it will be my very first time as electrician and learning this stuff from english language, I'm not very good with both themes!
Thanks again!