Search found 23 matches
- Sun Sep 09, 2007 12:32 am
- Forum: Technical Discussion
- Topic: GRID LOAD RESISTORS
- Replies: 21
- Views: 25256
Re: GRID LOAD RESISTORS
Statorvane sorry for spelling ya name wrong , its early in the morning here on sunday and i have a bad cold , not thinking straight ,
- Sun Sep 09, 2007 12:30 am
- Forum: Technical Discussion
- Topic: GRID LOAD RESISTORS
- Replies: 21
- Views: 25256
Re: GRID LOAD RESISTORS
Hi thanks stavarone , your right the voltages are all over the place to the preamp section , why so? and how would higher voltages improve , i know messa boogie uses real high voltages to their preamp section running the tubes right on the limit
CHEERS
CHEERS
- Sat Sep 08, 2007 9:06 am
- Forum: Technical Discussion
- Topic: GRID LOAD RESISTORS
- Replies: 21
- Views: 25256
Re: GRID LOAD RESISTORS
Hi yes thanks , i am just using the jcm as an example , if i lower the 10k on the plexi this will raise preamp voltages how will this effect the tone or response of the amp??
- Fri Sep 07, 2007 8:32 am
- Forum: Technical Discussion
- Topic: GRID LOAD RESISTORS
- Replies: 21
- Views: 25256
Re: GRID LOAD RESISTORS
how does this work??? preamp main filter cap has a 10k resistor , ive heard that the optimum value that suits jcms is 4k7 ? how does the lower resistance effect tone or performance ???
- Tue Sep 04, 2007 11:47 am
- Forum: Technical Discussion
- Topic: GRID LOAD RESISTORS
- Replies: 21
- Views: 25256
Re: GRID LOAD RESISTORS
Also why has the plexi a 1k5 2watt resistor coming from the tail pair of 220s from PI to pin 5 on EL34 , and the JCM800 has 5K6? what is the difference?
Cheers
Cheers
- Mon Sep 03, 2007 9:51 pm
- Forum: Technical Discussion
- Topic: GRID LOAD RESISTORS
- Replies: 21
- Views: 25256
Re: GRID LOAD RESISTORS
Hi thanks men, mine has the split cathode on first pre,i am already running a 10uf + 820 and 2k7 + .68sozo , and a .68 on 2nd pre cathode
Cheers
Cheers
- Mon Sep 03, 2007 9:10 am
- Forum: Technical Discussion
- Topic: GRID LOAD RESISTORS
- Replies: 21
- Views: 25256
Re: GRID LOAD RESISTORS
Thanks people, ive got it, now if u lower the value say from 470k to 270k u will get more drive or signal and will this produce to much blocking distortion?
Also would a good carbon film be better than a c/c in this position,should i use 1watt instead of 1/2 watt resistors?
Cheers
Also would a good carbon film be better than a c/c in this position,should i use 1watt instead of 1/2 watt resistors?
Cheers
- Sun Sep 02, 2007 8:48 am
- Forum: Technical Discussion
- Topic: GRID LOAD RESISTORS
- Replies: 21
- Views: 25256
GRID LOAD RESISTORS
Hi i have a JMP50 plexi and not sure on how the 2 x 470k mix resistors work, I think one is the mix and the other with the bright cap is the grid load side?
Can someone explain and what happens if u lower values here???
Cheers
Can someone explain and what happens if u lower values here???
Cheers
- Tue Aug 21, 2007 7:26 am
- Forum: Trainwreck Discussion
- Topic: primary & secondary inpedances
- Replies: 2
- Views: 990
primary & secondary inpedances
Hi can someone explain what values suit a express and also what spec for the unloaded B+ should i be looking for ???
- Mon Aug 20, 2007 11:52 am
- Forum: Technical Discussion
- Topic: electrolytics polarity????
- Replies: 7
- Views: 1811
Re: electrolytics polarity????
Cheers mate , might be ingnorance on my part but with the electrolytics do u connect the pos or neg side to cathod pin on tube or the other way round
- Mon Aug 20, 2007 9:46 am
- Forum: Technical Discussion
- Topic: electrolytics polarity????
- Replies: 7
- Views: 1811
electrolytics polarity????
Hi guys i still get confused about which way to wire a polarised cap to cathodes, some caps just have a arrow with black insert on one end , others like sozo have a band at 1 end , and blackgates have short and long leads What is easy way to remember ,call me dumb , could be memory lose happening he...
- Sat Aug 18, 2007 9:25 pm
- Forum: Technical Discussion
- Topic: CATHOD CAPS FOR TRAINWRECK EXPRESS
- Replies: 11
- Views: 2180
Re: CATHOD CAPS FOR TRAINWRECK EXPRESS
Thanks guys thats what ive thought , theres so much to be had in the cathodes and different values, if you dont bypass with a cap doesnt that give the signal more punch and headroom so ive heard??
is it better to have large caps in the early stages and drop values down as u move down the line ?
Cheers
is it better to have large caps in the early stages and drop values down as u move down the line ?
Cheers
- Sat Aug 18, 2007 9:32 am
- Forum: Technical Discussion
- Topic: CATHOD CAPS FOR TRAINWRECK EXPRESS
- Replies: 11
- Views: 2180
Re: CATHOD CAPS FOR TRAINWRECK EXPRESS
Thanks gearhead , also with the express there is a 10k resistor on cathode of 2nd preamptube, will using a larger value drop gain and why is there no cathode cap in parrallel with this resistor? can someone help out here?
- Sat Aug 18, 2007 9:31 am
- Forum: Technical Discussion
- Topic: CATHOD CAPS FOR TRAINWRECK EXPRESS
- Replies: 11
- Views: 2180
Re: CATHOD CAPS FOR TRAINWRECK EXPRESS
Thanks gearhead , also with the express there is a 10k resistor on cathode of 2nd preamptube, will using a larger value drop gain and why is there no cathode cap in parrallel with this resistor? can someone help out here?
- Fri Aug 17, 2007 11:31 pm
- Forum: Technical Discussion
- Topic: CATHOD CAPS FOR TRAINWRECK EXPRESS
- Replies: 11
- Views: 2180
Re: CATHOD CAPS FOR TRAINWRECK EXPRESS
Hi thanks mate,will give it a go,just thought that the lower wattage might make the amp more touch responsive in some sort of way , new to this still learning here ill try and post results
Cheers
Cheers