Re: whistles in receive
There have been numerous articles in QST over the years on rebuilding these old rigs. I found an article which I saved somewhere on building transistor substitutes for the tubes. you could build them on small perf boards and set up a set of wires that corresponded to the pin out on the tubes. At one time, someone was making modules to replace all the low power and receiving tubes on the Collins S line. That was at least 40 years ago. I don't do well on a lot of these tiny connections anymore due to age and aging eyes, but my history skills are still largely intact.
PS: Still awaiting shipment on my Bitx.
On 2/5/2018 10:40 AM, Ashhar Farhan wrote: