Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
Harma 6L6GCSTR valve problem
So called Superior Grade Cryo
Work ok and test ok but in use and the tester there is low insertion/extraction force in the sockets. Dragon's teeth hold them in place ok, so will not fall out. Measuring the pin diameters about 2.15 mm compared to a random selection of others laying around of 2.3mm. Known problem ? or leave alone or squash the pins a bit , perpendicular to the base forks gap ? and colateral damage ? These are from Peavey Deuce with final IC before the valves is corrupt so possibility of intermittant valve action feeding spikes back into the preamp ? no abnormal use admitted to , to have occassioned the IC failure |
#2
Posted to sci.electronics.repair
|
|||
|
|||
Harma 6L6GCSTR valve problem
"Nutcase Kook" These are from Peavey Deuce with final IC before the valves is corrupt so possibility of intermittant valve action feeding spikes back into the preamp ? ** WTF are you an about ??? The Peavey Deuce VT has a pair of transistors driving the output valves - from a 300 volt DC supply. Wot a bloody lunatic. ..... Phil |
#3
Posted to sci.electronics.repair
|
|||
|
|||
Harma 6L6GCSTR valve problem
N_Cook wrote:
So called Superior Grade Cryo Work ok and test ok but in use and the tester there is low insertion/extraction force in the sockets. Dragon's teeth hold them in place ok, so will not fall out. Measuring the pin diameters about 2.15 mm compared to a random selection of others laying around of 2.3mm. Known problem ? or leave alone or squash the pins a bit , perpendicular to the base forks gap ? and colateral damage ? These are from Peavey Deuce with final IC before the valves is corrupt so possibility of intermittant valve action feeding spikes back into the preamp ? no abnormal use admitted to , to have occassioned the IC failure I don't see any IC's there? I do see a pair of transistors that may be suffering. Report back when you can determine the type of damage the transistors are getting, which one, and how was it damaged? collector short, base to emitter short? no gain? etc,,,, Jamie |
#4
Posted to sci.electronics.repair
|
|||
|
|||
Harma 6L6GCSTR valve problem
Jamie t wrote in message
... N_Cook wrote: So called Superior Grade Cryo Work ok and test ok but in use and the tester there is low insertion/extraction force in the sockets. Dragon's teeth hold them in place ok, so will not fall out. Measuring the pin diameters about 2.15 mm compared to a random selection of others laying around of 2.3mm. Known problem ? or leave alone or squash the pins a bit , perpendicular to the base forks gap ? and colateral damage ? These are from Peavey Deuce with final IC before the valves is corrupt so possibility of intermittant valve action feeding spikes back into the preamp ? no abnormal use admitted to , to have occassioned the IC failure I don't see any IC's there? I do see a pair of transistors that may be suffering. Report back when you can determine the type of damage the transistors are getting, which one, and how was it damaged? collector short, base to emitter short? no gain? etc,,,, Jamie The 300V transistor pair are ok , as is the clean channel prea. |
#5
Posted to sci.electronics.repair
|
|||
|
|||
Harma 6L6GCSTR valve problem
-- -- N_Cook wrote in message ... So called Superior Grade Cryo Work ok and test ok but in use and the tester there is low insertion/extraction force in the sockets. Dragon's teeth hold them in place ok, so will not fall out. Measuring the pin diameters about 2.15 mm compared to a random selection of others laying around of 2.3mm. Known problem ? or leave alone or squash the pins a bit , perpendicular to the base forks gap ? and colateral damage ? These are from Peavey Deuce with final IC before the valves is corrupt so possibility of intermittant valve action feeding spikes back into the preamp ? no abnormal use admitted to , to have occassioned the IC failure Marking a line outside of the socket base perpendicular to a fork, transfering a line to the valve base to get the correct "reversed" orientation . Then a 1.9mm rod as a stop in the jaws of parallel action pliers deformed the pins to elliptical axes of 2 and 2.3mm in the right sense to increase the grip. |
#6
Posted to sci.electronics.repair
|
|||
|
|||
Harma 6L6GCSTR valve problem
On Wed, 14 Sep 2011 14:46:39 +0100, N_Cook wrote:
So called Superior Grade Cryo Work ok and test ok but in use and the tester there is low insertion/extraction force in the sockets. Dragon's teeth hold them in place ok, so will not fall out. Measuring the pin diameters about 2.15 mm compared to a random selection of others laying around of 2.3mm. Known problem ? or leave alone or squash the pins a bit , perpendicular to the base forks gap ? and colateral damage ? These are from Peavey Deuce with final IC before the valves is corrupt so possibility of intermittant valve action feeding spikes back into the preamp ? no abnormal use admitted to , to have occassioned the IC failure Never had problems with Peavey sockets even on a VX VTR series that blew one of the drivers. Replace with a pair of MJE13003 and the rest is history. -- Live Fast Die Young, Leave A Pretty Corpse |
#7
Posted to sci.electronics.repair
|
|||
|
|||
Harma 6L6GCSTR valve problem
Meat Plow wrote in message
... On Wed, 14 Sep 2011 14:46:39 +0100, N_Cook wrote: So called Superior Grade Cryo Work ok and test ok but in use and the tester there is low insertion/extraction force in the sockets. Dragon's teeth hold them in place ok, so will not fall out. Measuring the pin diameters about 2.15 mm compared to a random selection of others laying around of 2.3mm. Known problem ? or leave alone or squash the pins a bit , perpendicular to the base forks gap ? and colateral damage ? These are from Peavey Deuce with final IC before the valves is corrupt so possibility of intermittant valve action feeding spikes back into the preamp ? no abnormal use admitted to , to have occassioned the IC failure Never had problems with Peavey sockets even on a VX VTR series that blew one of the drivers. Replace with a pair of MJE13003 and the rest is history. -- Live Fast Die Young, Leave A Pretty Corpse Not a socket problem but out of mechanical spec valve problem |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Hum problem on a valve amp | Electronics Repair | |||
Brass Ball Valve,Gas Valve,Needle Valve,Angle Valve Sale on good price | Home Repair | |||
Valve,Butterfly valve,Globe valve,Check valve,Ball valve,Plug valve,Marine valve,Gate valve,Flow control valve | UK diy | |||
Valve,butterfly valve,ball valve,check valve,globe valve | Home Repair | |||
Diverter valve problem fixed but now another problem. | UK diy |