[EICO] (no subject)

[shoppa_eico at trailing-edge.com]

<pbmanis at bellsouth.net> wrote:
> I noticed that you used 100 uF/450 V instead of the original 40 uF/450V.

In a not-identical restoration (my 720 transmitter), I had great
success with making the note sound sweeter by beefing up the filter
caps similarly. I was not able to find axial lytics in that voltage
range but the radials and some extension wire seemed to do the job
nicely enough.

One worry was that the rectifier tube wouldn't handle the higher
peak current but I have not yet melted it :-).

> Did you also replace the filter 
> choke (listed as a 5/25H choke - e.g., swinging)?

Do these "go bad", or were you talking about changing the filter choke
so it's a better match to the new caps?

Looking at the dropping resistors inside my 720 I always think
"there had to be a better way to do this". But maybe there wasn't!
A second B+ winding would've required additional rectifier tube
and additional filtering, in what was undoubtedly an already
cost-sensitive market. I mean the $70 or $80 list price in
early 60's dollars would be $300 or $400 today after adjusting
for inflation...

Tim.