sb-303 LMO problem

[Dave Edwards]

I wonder if that has to do with revisions of the 303. I have used mine quite
a bit without the SB401, and never added a load to the LMO jack. I also do
not remember a mention of that in the manual. I will have to look again.
By the way 303 owners.... I have another 303 that someone added the noise
blanker from the SB104. There was an article on doing that in 73 magazine.
I don't like major mods like that, but boy...it sure works well!
...Dave
-----Original Message-----
From: wa1vwl <wa1vwl at GROLEN.COM>
To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
Date: Monday, August 30, 1999 6:56 PM
Subject: Re: sb-303 LMO problem


>Had a similar problem last year when I bought an SB-303 for the princely
>sum of fifty bucks. Took it home, turned it on, and...same results you
>got. Way back in the bowels of the SB-303 manual is a short note
>addressing that problem. It seems there's supposed to be a 50 Ohm dummy
>resistor plugged into the LMO OUT jack when the 303 is used by itself .
>When I plugged one in, the LMO behaved. The previous owner didn't try
>that, apparently. Tried to pry open the LMO with what seemed to be a can
>opener. At least the results seemed to be that way. The 50 Ohm resistor
>is not needed if you plan to use the 303 with the SB-400/401. Check the
>transmitter manual for more precise info.
>
>73/Gerry/W1ID
>
>Rick Booth wrote:
>>
>> I have a sb-303 with a LMO that appears to have gone goofy.  It works ok
for about the
>> first 25 KHz, gets severly distorted for about the next 25 KHz and then
gives up entirely.
>>
>> I need a schematic if that is possible.  That will save me the hassle of
tracing out
>> whatever is lurking in that dang box.
>>
>> Thanks in advance.
>> Rick
>> w6nzk
>>
>> Sponsored by the City of Tempe
>>
>> Listserver Submissions:  heath at listserv.tempe.gov
>> Listserver Subscription: listserv at listserv.tempe.gov - "subscribe heath
'name' 'call'"
>> Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"
>
>Sponsored by the City of Tempe
>
>Listserver Submissions:  heath at listserv.tempe.gov
>Listserver Subscription: listserv at listserv.tempe.gov - "subscribe heath
'name' 'call'"
>Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"
>

Sponsored by the City of Tempe 

Listserver Submissions:  heath at listserv.tempe.gov
Listserver Subscription: listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'"
Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"