I've been running an EB104 watercooled BLF188XR kw on 2m for a year or so
I'll add a +1 to your recommendation.
73 .-James K7KQA
On Tue, Jan 19, 2021 at 12:40 PM Terry Price <email@example.com>
> Folks, thought I would pass this along. I've bought several of their HF-6m
> amps, 2m amps and 70cm amp (these are just the pallets, I add my own
> support electronics and relays). They work VERY well and the workmanship on
> the boards is first class.
> The HF/VHF units use a pair of MRF300's which are a cheap plastic tab
> device that is about $40 each from Digikey. They require 50V at 10-15A and
> 12v for bias. I've found a device, a TL783 which is a 3 terminal regulator
> that unlike 78XX series which will only take up to 36v on the input,
> TL783's will take 50V and give up to 700ma output current, more than enough
> to run relays and provide 12v bias. These devices only need two resistors
> to set the voltage. I build mine with a pot in place of one resistor so I
> can adjust the voltage to suit whatever relays I'm using.
> If you are looking for medium power, 500w class, for these bands, check
> them out. I have no affiliation with them, just a happy customer. Shipping
> can take months with the current COVID situation but I've gotten some
> within weeks.
> Terry Price - W8ZN
> Directive Systems and Engineering
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