[Central-Electronics] Carrier suppression on CE100V

[manualman at juno.com]

When I had my CE100, I believe I also used 1N270's. Carrier suppression
averaged about 46 db.

Pete, wa2cwa
http://www.manualman.com

On Tue, 29 Jan 2013 13:06:25 -0500 George Maier <george at maiergroup.com>
writes:
> Well Joe, it sounds like you should be seeing over 40 dB, and closer 
> to the original spec of 50.  On the other hand,  I've never used 
> Schottky diodes in a CE 
> Exciter, and don't know what to expect.  Perhaps someone else on 
> the reflector has.
> Having said that, I don't normally use 1N34A's either, preferring 
> 1N270's instead. They're really close to 1N34's as a modulator, but 
> a lot more robust in the current handling department. 
> You might try measuring the carrier balance right at the modulator 
> to eliminate non-linearities in the rest of the chain making it look 
> worse.
> 
> 73, George- W1LSB 
> Sent from my Verizon Wireless 4G LTE DROID
> 
> "Fallon, Joseph" <joe.fallon at philips.com> wrote:
> 
> >Hi George,
> >
> >I used 1n5711 Schottky  diodes that I matched the Vf to less the 
> 1%.  The caps were replaced with 10uF, 50V electrolytics with 20% 
> tolerance.
> >
> >73’s
> >
> >Joe WA1IWQ
> >
> >From: George Maier [mailto:george at maiergroup.com]
> >Sent: Tuesday, January 29, 2013 9:51 AM
> >To: Fallon, Joseph
> >Cc: central-electronics at mailman.qth.net
> >Subject: Re: [Central-Electronics] Carrier supression on CE100V
> >
> >Hi Joe:
> >Did you match the diodes and caps?
> >73, George- W1LSB
> >
> >Sent from my Verizon Wireless 4G LTE DROID
> >
> >
> >"Fallon, Joseph" 
> <joe.fallon at philips.com<mailto:joe.fallon at philips.com>> wrote:
> >
> >Hi Folks,
> >
> >    Anyone know the typical spec for the carrier suppression of the 
> CE100V?  Replaced the Mod diodes and Caps, tweaked  the 8MHz osc and 
> I'm seeing about 35db which still seems to be on the low side?
> >
> >    Tnxs,
> >
> >    Joe WA1IWQ