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Date: Thu, 7 May 2009 14:09:16 -0400
Message-ID: <57a24ca70905071109yf108b14mce42ee2169148545@mail.gmail.com>
From: Warren Ziegler <wd2xgj@gmail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Decca 5501Jeep
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Mal,

   I have run continuous carrier for 2.5+ hours, that's equivalent to
QRSS 9000 !
--=20
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1


On Thu, May 7, 2009 at 10:32 AM, mal hamilton <g3kevmal@talktalk.net> wrote:
> Read what I said
>
> I said 120, 240 or FSK where the duty cyle is high. I did not mention
> 60!!!!!!!!!!
> G3KEV
>
> ----- Original Message ----- From: "Warren Ziegler" <wd2xgj@gmail.com>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Wednesday, May 06, 2009 8:29 PM
> Subject: Re: LF: Decca 5501Jeep
>
>
> Mal,
>
> =A0 You couldn't be more wrong!!!
> I have been running a Decca in QRSS 60 for several years now at full
> power + often overnight and occasionally for days at time with ZERO
> transmitter failures. The Decca runs cool at 1.4 - 1.5 kW DC input.
> Perhaps you are not allowing for sufficient air circulation through
> the heat sinks. My Decca is in a rack with plenty of clearance above
> and below for the air to circulate. I don't think that it's a good
> idea to run the Decca sitting on a table as I've seen done in some
> shack pictures.
>
> --
> 73 Warren K2ORS
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XGJ
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XSH/23
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XEB/2
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XGR/1
>
> On Wed, May 6, 2009 at 11:59 AM, mal hamilton <g3kevmal@talktalk.net> wrot=
e:
>>
>> The old decca Jeep 5501 cannot strand LMCW 120, 240 or dfcw for long, 3 o=
r
>> 10 sec dot or normal cw is about their limit on full power.
>> I have 2 units (6 modules) but prefer my home brew with robust FETS on 13=
7
>> Khz.
>> I likewise have a h/brew fet pa for 500 Khz class E and it is virtually
>> indestructable when correctly adjusted using a scope.
>>
>> G3KEV
>
>
>
> --------------------------------------------------------------------------=
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>
>
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>