[Moon-net] Advise on bifilar choke for 8877 filament

[Edward Cole]

I gave that a thought but making the coils and chokes is not that 
hard.  After I paid Rich for his labor plus shipping I might as well 
stock up on necessary magnet wire form Nebraska Surplus Sales.  I 
also needed a transmitting ceramic capacitor and good quality 
N-female flange-mount connnectors and I addes some silver-mica caps 
in small values to round out the order.

Thanks to all that responded.  I decided to faithfully follow the 
design notes from Eimac and make the #12awg bifilar choke.  I needed 
some 14awg wire for coils so have 25-foot of each comming which will 
add to my supplies for future needs.  I may be winding some matching 
toroid coils for a 500-KHz Beverage antenna, soon.

I will update the project webpage in a week or so when I have more to show:
http://www.kl7uw.com/2m-8877.htm

The control/bias/metering panel is completed but doing some troubleshooting.

73, Ed - KL7UW

At 04:56 AM 5/16/2008, WA4EWV wrote:
>GM, Ed:
>Why don't you give Rich a call at AntennaWorks? He may sell you the 
>coils or enough wire to make them.
>(916) 765-5811
>or
>rich at antennaworks.com
>
>Good Luck
>Al
>WA4EWV
>
>
>----- Original Message ----- From: "Edward Cole" <kl7uw at acsalaska.net>
>To: <moon-net at list-serv.davidv.net>
>Sent: Thursday, May 15, 2008 11:57 PM
>Subject: [Moon-net] Advise on bifilar choke for 8877 filament
>
>
>>I'm winding coils for my 2m-8877 PA (classic-W6PO design) and am
>>wondering if I might use insulated #12 solid copper wire in place of
>>enameled #12?  I will have to buy a complete spool of the enameled
>>wire mail-order if that is necessary.  It appears to me that
>>insulation in the bifilar choke is for dc voltage so insulation would
>>likely only shift the inductance some.  I can check that with a MFJ-269.
>>
>>So what's the opinion on this?
>>The remaining coils are all #14 copper which can be found locally.
>>
>>*****************************************************
>>73, Ed - KL7UW              BP40iq, 6m - 3cm
>>144-EME: FT-847, mgf-1801, 4x-xp20, 185w
>>http://www.kl7uw.com     AK VHF-Up Group
>>NA Rep. for DUBUS: dubususa at hotmail.com
>>*****************************************************
>>
>>
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>>
>