[Central-Electronics] 20-A SSB Question

[Tom Elmore]

Jim, you are correct and it helps to read the manual closer to see that on
160 that I should be in the SB2 position. After I sent the email the other
evening I had about a 30 minute QSO with a station in Pedro Bay, Alaska with
me in Anchorage (194 miles distance) after 12:00 am which also gave me
really good audio reports as always with the CE gear. He was running 1300
watts into a rhombic while I was loading my 80 meter dipole up on 160 at
about 12 watts. 160 was the quietest I have heard it in a long time.
In fact we were on 1850 and there was a dx pedition from Christmas Island
down at 1845 
I was able to hear.  

-Tom

-----Original Message-----
From: central-electronics-bounces at mailman.qth.net
[mailto:central-electronics-bounces at mailman.qth.net] On Behalf Of Jim
Candela
Sent: Saturday, October 08, 2011 12:46 PM
To: central-electronics at mailman.qth.net
Subject: Re: [Central-Electronics] 20-A SSB Question

Tom,

    So thinking about this some more while shampooing the rugs (honey do 
project!), I plugged a 7130 40m crystal into my 20A. Then moved switch 
from VFO to Crystal. So on 160m, I get a nice signal on 1870 Khz where 
SB1 is LSB! So you cannot say SB1 or SB2 is LSB for a given band. Goes 
back to the math. Here we have 9 - 7.130  = 1.870. :-)

PS If you have a collection of 40m crystals, these can be handy for 
working 160m with a 20A. You might get a little more power from the 20A 
too with a crystal if the VFO output was a bit low ..

Jim
WD5JKO

On 10/8/2011 1:14 PM, Jim Candela wrote:
>
> Tom,
>
>      The SB1&  SB2 vary in which is LSB, or USB depending on whether the
> 9 mhz is added to or subtracted from. So with a CE modified BC-458, LSB
> on 160M is SB2, and is SB1 on 80m. Yes a source of a lot of confusion!!
>
>    80m SB1 = LSB ( 9 - 5.5 = 3.5 Mhz)
> 160m SB2 = LSB [(2 X 5.5) - 9] = 2 Mhz
> 40m SB2 = LSB [(3 X 5.5) -9] = 7 Mhz
> 20m SB2 = USB ( 9 + 5.5) = 14.5 Mhz
>
> (methinks!)
>
> Jim
> WD5JKO
>
> On 10/8/2011 3:00 AM, Tom Elmore wrote:
>> This evening while working a station on 160 on 1850 kc  about 100 miles
to
>> the south of me he couldn't hear me while on SSB. I switched the 20-A
over
>> to AM and put in a few watts of carrier and he was able to hear me quite
>> well according to him. I switched back to SB1 position and he was unable
to
>> hear me. I am using a HQ-170A for the receiver and I was able to hear my
own
>> SSB signal on LSB while in the Cal position.  This has me puzzled while I
>> can hear my own signal on SSB but the station I was working could only
hear
>> me when I was in AM mode.  I assume on the 20-A that SB1 equates to LSB
and
>> SB-2 to USB?
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Thank You
>>
>>
>>
>> Tom Elmore KA1NVZ
>>
>> Anchorage, Alaska
>>
>>
>>
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