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Re: [Amps] Alpha 86 / 89 Plate RFC

To: <>
Subject: Re: [Amps] Alpha 86 / 89 Plate RFC
From: "Robert W5AJ" <>
Date: Thu, 28 Jan 2021 23:42:34 -0600
List-post: <>
TNX to everyone for replies on Plate choke change out!

RFC3 from RF Parts works


Change is complete

Tomorrow will get clear photo for the 15M test - shown on link below


About only blip was the DC blocking capacitor.  was up against ground on
variable capacitor

Alpha 89 Works great now!


73 W5AJ



Midland, Texas



From: Robert W5AJ [] 
Sent: Tuesday, January 26, 2021 10:08 AM
To: '' <>
Subject: Alpha 86 / 89 Plate RFC 



The Alpha 86 and 89 use a Home brew relay/Flapper scheme in HV path to short
out part of HV Plate choke 


RF Parts sells RFC that all indications can replace the existing choke and
remove the flapper


Has anyone changed out the plate choke to eliminate the shorting flapper? 


Saw article where author rolled his own and removed the flapper 





Midland, Texas


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