[ARC5] Info sought about output transformer in BC-221-AK

[Richard Knoppow]

     My BC-221 turns out to be an AH. The phones in the compartment are 
HA-58/U. I don't have  them on my list of measurements so will put them 
on the bridge later and find out. I can also find out what the output 
impedance is.

On 1/5/2018 11:02 AM, Leslie Smith wrote:
>    Hello James,
> 
>    Thanks for that info.  In this instance I'm not restoring or 
> repairing a BC-221.  I bought a shabby set - no case, no calibration 
> book, subbed tubes and with a crease in the side and front panel.   The 
> (very naughty) fellow selling the "thing" told me "only the crease you 
> see" and "didn't notice that" when I asked about the crease in the side 
> panel.
> 
> So I'm using the chassis (and the output transformer) for another purpose.
> I'm going to wring some useful performance from 3 tubes.  Sort of "well 
> built minimalist" approach.
> Also,  I cannot bear the thought of such a fine capacitor and tuning 
> gear going to scrap.
> That is the fate of gear that doesn't work.  (Sigh).  But in my workshop 
> it has found a home!
> 
> Thanks for your very useful info.
> 
>     73 de Les Smith
> vk2bcu at operamail.com <mailto:vk2bcu at operamail.com>
> 
> PS  I read the point about the low-Z phones and assumed they were 600 ohms.
> That was my guess.  That would be a turns ratio of 3.65.
> For 300 ohms = 5.1 :1 (or for 256 = 5.59)
> I guess it's better to know than to guess.
> 
>     73 de Les Smith
>     vk2bcu at operamail.com
> 

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL