I bought some Sprague Orange Drop capacitors to replace those brought my amp, before deciding to place jumped the fuse, I opened the bottom cover of the amplifier and detected the tracks of the PCB were detached from the plate and some about to split, I decided make a new plate and replace all components, thinking it could have been a short break and cause the fuse.
With the new board and put it into operation again to jump the fuse. I took tensions and apparently everything is correct.
With the valves 7199 and GZ34 rectifier does not pop the fuse, I detected a failure in the rectifier tube I replaced and rectifier diode (1N4007) and two capacitors 47uF-100V.
The amplifier works again, but one day after the fuse blows again.
The Choke is wax on the outside support, so I'm hoping to send a new Kevin (Dynakitparts) because I think it can ocaasionar shorts.
The filter capacitor gives me the following measures with 200k scale:
- Semicircle --- 185.9
- Square ---- 159.6
- Triangle ----- 179.1
- No mark ---- 185.0
If I turn the unit to heat the fuse blows, if I have placed the outlet valves (EL34) does not pop the fuse.
¿¿The problem I can come capacitor four, perhaps the outlet valves (I have no valve tester), or I have another problem?
NOTE.- I have to report that my voltage is 220V., Which are real 240v., I have placed external transformer 220/125v. and 1000VA., I picked input voltage and there amplificcador 130 to 140 v.
Thanks again for your attention.