|
|
Post by oldgeezer on Aug 1, 2017 5:37:12 GMT -5
I have a Hitachi 6BQ5 in my Cobra Cam 88. Does about four watts & swings to 12 watts. I bought a new GE 6BQ5 as a backup tube and it does only 2 watts with little forward swing. I know the tube is new, tests strong. Why does not the GE perform at RF?
|
|
Sandbagger
Administrator/The Boss 
Posts: 6,247 
|
Post by Sandbagger on Aug 1, 2017 8:19:11 GMT -5
I have a Hitachi 6BQ5 in my Cobra Cam 88. Does about four watts & swings to 12 watts. I bought a new GE 6BQ5 as a backup tube and it does only 2 watts with little forward swing. I know the tube is new, tests strong. Why does not the GE perform at RF? Have you tried re-peaking the load and plate caps? |
|
|
|
Post by oldgeezer on Aug 2, 2017 13:16:21 GMT -5
I did not bother to re-peak the RF output tank circuit as it only made 1/2 power out- to far out of wack. I ordered Russian 6BQ5.
|
|
