Sorry folks, I quoted data from the Titan III which uses 4CX800A tetrode
tubes and not 3CX800A7 triode tubes. The latter was used in the earlier
version of the Titan amps. My manual is for the Titan III. Ken is correct,
there is no screen grid in the 3CX800A7 tubes nor is there a screen supply.
In either case, the Titan will "generate lotsa' watts".
73
Bob, K4TAX
----- Original Message -----
From: "Ken Brown" <ken.d.brown@hawaiiantel.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Thursday, January 17, 2008 10:04 PM
Subject: Re: [TenTec] 425 titan
> Hi Bob,
>
> The Titan 425 uses a pair of 3CX800A7 triodes. Your advice to watch the
> (control) grid current is good. There is no screen grid.
>
> DE N6KB
>
>
> Bob McGraw - K4TAX wrote:
>> For RTTY it is rated 1000 watts output for 10 minutes of transmit time
>> with
>> a 50% duty cycle. i.e. 10 minutes transmit, followed by 10 minutes of
>> receive. Follow the TUNE UP procedure in the manual and do not over
>> drive
>> the amp. Pay very close attention to Screen current and grid current.
>> Be
>> sure the load/antenna is near 50 ohms i.e. SWR <1.5:1 before starting to
>> tune the amp. Start with 10 watts of drive from the exciter.
>>
>> While it is well protected, overdrive can make for expensive and sudden
>> tube replacement needs.
>>
>> And, if you don't have a manual, order one from Tentec.
>>
>> 73
>> Bob, K4TAX
>>
>>
>>
>>
>> ----- Original Message -----
>> From: <W1dxh@aol.com>
>> To: <tentec@contesting.com>
>> Sent: Thursday, January 17, 2008 4:12 PM
>> Subject: [TenTec] 425 titan
>>
>>
>>
>>> hello to all,
>>> i am a newbie to rtty and was wondering if anyone has
>>> used the 425 titan on rtty? at what power did you run it at, and is
>>> there
>>> any
>>> thing i should know before hand. thanks any info appreciated. don't
>>> want
>>> to
>>> smoke anything hi hi.
>>>
>>> 73's,
>>> steve w1dxh
>>>
>>>
>>>
>>> **************Start the year off right. Easy ways to stay in shape.
>>> http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>>
>>
>>
>> _______________________________________________
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>>
>>
>
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