[Amps] Source for 8877 amp input tuning coil needed

["Joe Barger" <barger@aero.org>]

I'm working on a "classic" W6PO 144 MHz 8877 amp 
(http://web.wt.net/~w5un/8877-1.htm) .  The input tuning circuit calls for L1 
to be wound on a 1/2" diameter form with a white tuning slug (CTC 1538-4-3) .   
Does anyone know where I can find this particular form?  Or a reasonable 
replacement?  The amp currently just has the coil and some unknown ferrite rod 
stuck in the middle and can't get the SWR between the amp and driver below 3:1.

Thanks

joe n6kk
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