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LF: Re: M0BMU mods to the G0MRF PA

from [Gary - G4WGT] [Permanent Link][Original]
To: <[email protected]>
Subject: LF: Re: M0BMU mods to the G0MRF PA
From: "Gary - G4WGT" <[email protected]>
Date: Sat, 15 Dec 2012 20:01:03 -0000
In-reply-to: <CAMFjj723AN8YQa1yKot=6QTTBkaXH_0e-8u3O+O-u_=t1BU2dw@mail.gmail.com>
References: <CAMFjj723AN8YQa1yKot=6QTTBkaXH_0e-8u3O+O-u_=t1BU2dw@mail.gmail.com>
Reply-to: [email protected]
Sender: [email protected]
Hi Warren,
 
I have carried out the M0BMU mods to my G0MRF amp. The improvement is extremely good. Not only does the PA run cool the output is greatly increased. I have run mine at 600 watts into dummy load during the initial testing after the mod & up to 400 watts into antenna during normal Tx.
 
See my web page at :-
 
 
I hope this will help.
 
73,
 
Gary - G4WGT.
 
----- Original Message -----
Sent: Saturday, December 15, 2012 4:17 PM
Subject: LF: M0BMU mods to the G0MRF PA

Hello the list...
       Since my G0MRF is experiencing intermittent short circuit in the final amp, I plan on re-doing the output circuit per the M0BMU modification:
       The M0BMU mod changes the circuit to a current fed design which improves the efficiency. The mod calls for a transformer primary winding using 12 strands of 0.3mm e.c.w. (enamel covered wire). 
I assume that the 12 strands are used to improve the Q similar to the way Litz wire works? 
        Has anyone done this mod? Has anyone tried alternatives to the 12 strands of enamel wire?

   73 & tnx Warren K2ORS


--
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1

 
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