[ICOM] 718 Receiver

[George Lee]

Andy, I am not all that familiar with the 718 but was wondering if there is 
a way the transmit is locked in the AM or RTTY mode?

Probably not so but, it sure sounds as if it is somehow locked on the 1/2 
power level often found on 100 watt radios when in the AM, FM, RTTY mode.

Good luck guys.

73, George

----- Original Message ----- 
From: <awallacejr at sbcglobal.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Sunday, December 05, 2004 11:49 AM
Subject: Re: [ICOM] 718 Receiver


> Thanks Gary. It is a new Icom power supply with a dedicated connection to 
> the radio and he is also using an Icom 180 auto tuner properly hooked up. 
> We also did two hard resets of the radio CPU to no avail. Also checked the 
> antenna SWR with a MFJ meter--it is under 1.5 with no tuner. Will try the 
> dummy load approach for impedence problems but it is interesting that the 
> radio puts out exactly 1/2 its rated power; not close to 1/2 but exactly 
> 1/2 or 50 watts key down on RTTY.
>
> You may know Sandy-N5NBW--who owns the radio.
>
> BTW, the little radio is a lot of fun to operate and seems to be a lot of 
> bang for the buck--especially if we can get 100 watts out ;-)
>
> Andy K5VM
>
>
> ----- Original Message ----- 
> From: "Gary Fiber" <g.fiber at verizon.net>
> To: "ICOM Reflector" <icom at mailman.qth.net>
> Sent: Sunday, December 05, 2004 11:16 AM
> Subject: Re: [ICOM] 718 Receiver
>
>
>> What are you using for a power supply?
>>
>> I had this happen on an FM transceiver once and found the binding posts 
>> even though real finger tight were loose.  The transceiver was current 
>> starved. Tightening up with a wrench solved the trouble.
>>
>> Have you got a dummy load to use in place of the antenna. A low SWR does 
>> not always equate to the correct impedance.
>>
>> Its unlikely it would come from the factory so low on output power. 
>> Possible a bad final could be the problem though they are pretty good.
>>
>> Gary K8IZ
>>
>>>Hi All-
>>>
>>>Have a friend with a new 718 that I helped him set up. No matter what 
>>>transmit power setting we use ( including transmit= H ), we can't get the 
>>>radio to put out more than 50 watts. Have very low antenna SWR and 
>>>received S-9 SSB reports from Calif ( we live in Texas ). Key down in 
>>>RTTY shows exactly 50 wattts on radio's power meter.
>>>
>>>Any thoughts? Could it have a bad power transistor?
>>>
>>>Thanks, Andy K5VM
>>
>> Gary Fiber K8IZ
>> GROL PG-19-6691
>> Washington State Resident
>>
>>
>> ----
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>
>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
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> Details at: http://mailman.qth.net/
>