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Re: Drake L-7


 

开云体育

I've just bought 4 from W8JI at CTR Engineering. Installed one in my AL-1500 and one in my home brew 2 x 3-500Z 160 to 10 amp. No problems on any band with those chokes.

73, Alek VK6APK.

On 28/01/2025 8:06 am, Dave w6de wrote:

From my own experience in blowing up two of those, is that RFC3 RF-choke purchased from RF-Parts is resonant on 30 meters when used in a 3-tube (8874) Alpha 76A amplifier.? Use in other amplifiers may differ.?

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73,

Dave, w6de

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From: [email protected] <[email protected]> On Behalf Of Evert Bakker via groups.io
Sent: 27 January, 2025 20:32
To: [email protected]
Subject: Re: [ham-amplifiers] Drake L-7

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I found the RF-choke I used :

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73, Evert

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From: [email protected] <[email protected]> On Behalf Of Fran?ois via groups.io
Sent: Monday, 27 January 2025 07:02
To: [email protected]
Subject: Re: [ham-amplifiers] Drake L-7

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Hello,

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> Do you have the service manual of this amp?

** No, I don't have the service manual for this amp. If you could share it with me, it would be appreciated.

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> I remember the green capacitor (B) but not (A).

** Your capacitor 'A' went with your old RF choke.

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A= 47 pF

B= 307 pF

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Thanks for the images of your modifications; they can be very useful to me

--

F1AMM

Fran?ois

De la part de Evert Bakker
贰苍惫辞测é?: dimanche 26 janvier 2025 20:45

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