Mark, you can use plain mineral oil. I have a lot of transformer oil here on hand if you'd rather have "official" oil. But it'd probably just be as cheap to go to your local farmer supply store and buy it. (They sell by the gallon for horses)

Thanks,

Andrew

KX4DV

On Tue, Oct 10, 2023 at 4:00 PM Mark Foltarz via Milsurplus <milsurplus@mailman.qth.net> wrote:

I am cleaning up a Bird Termaline 8890 in preparation for working on my GPT 10K and I realize it most likely needs some oil.
I reach out to Bird and ask for a modern equivalent to the part # indicated in the manual
They cheerfully send me to a link ( Bird RPK8890-3, Coolant Kit | Bird RF Online Store (btgstore.com) ) for the oil.
The kit only costs $1300 for 3 gallons of oil - and a gasket.
I couldn't believe it.
Anyone have any advice about a lower cost replacement for the oil ?
I was thinking of using the MFJ transformer oil for loads.

tnx
de WA4AM
Mark

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