11-14-2012, 08:16 PM
So... I figured out the electrolytic caps. I used a 10uF and 16uF where the schematic calls for 8uF and 14uF respectively. I also went through and replaced the other paper and wax caps, plus the ones that the previous owner had removed/replaced. I have another chassis I picked up for a 6S203 that I will work on next, so I bounced the schematic off the other chassis (untouched other than electrolytics it would appear) and wired them the same way.
When I am tuned to a strong station, in general, the radio plays OK. Sometimes, it will be have very very poor reception. When the reception is OK and I tune away from a station it starts to motorboat. when the reception is poor, there is no motorboating.
In the event that it isn't motorboating, the reception stinks. If I mess around with the shield, tap on, or remove the cap lead from the 6K7G, it will receive, but also start motorboating. I also have replaced resistors R7 and R6 coming off the 6F6, R4 and R6 from the 6F5, and R3 off the 6K7. What should I start with now? Did I miss a grid load resistor?
EDIT: I swapped the 6A8G and 6K7G with others from my stash. There was no change. I also tried to monkey around with the tube shields to no avail.
I'm really looking forward to getting this one going... I was planning on giving it to my dad for Christmas.
When I am tuned to a strong station, in general, the radio plays OK. Sometimes, it will be have very very poor reception. When the reception is OK and I tune away from a station it starts to motorboat. when the reception is poor, there is no motorboating.
In the event that it isn't motorboating, the reception stinks. If I mess around with the shield, tap on, or remove the cap lead from the 6K7G, it will receive, but also start motorboating. I also have replaced resistors R7 and R6 coming off the 6F6, R4 and R6 from the 6F5, and R3 off the 6K7. What should I start with now? Did I miss a grid load resistor?
EDIT: I swapped the 6A8G and 6K7G with others from my stash. There was no change. I also tried to monkey around with the tube shields to no avail.
I'm really looking forward to getting this one going... I was planning on giving it to my dad for Christmas.
