-=> Quoting Jeff Edmonson to Doug Espy <=-
> JE> Just need a decent working exciter (ie; Johnson Viking
> JE> Ranger, or Viking II with the 6146's replaced with 2E26's)
> I recall the 2E26 as being used on the old low band Motorola repeaters
> and likewise equipment. Does this tube work more effeciantly on HF and
> upper bands like 10?
JE> the 2E26 is the exact equivalent of a 6146, only half the
JE> plate dissapation. Check the tube manuals - the plate to
JE> plate capacitance is near exactly the same as the 6146
> also what mods are required if any to install them lets say
> on an old TS-520 or 820? This is intresting!
JE> None. Take the 6146's out, replace 'em with 2E26s and
JE> expect half the power out.
JE> Where you would normally run around 250mA of plate current
JE> with the 6146's, only load the 2E26's to half of that, or
JE> 125mA. After that, it's as easy as PIE!
JE> P = I * E
JE> P = 250mA * 800VDC
JE> P = 200W DC Input to the final
JE> Half that current would result in 100DC input to the final, or
JE> aproximatly 50w output (at max power) and that's about twice what you
JE> would need for CW, on say, 40m.
JE> Now for the bad news;
JE> FINDING 2E26's is a different story :(
JE> 73 = Best Regards!
JE> -Jeff KA5THB
I was'nt aware that the 2E26 held half power. I think I remember 80 watts of
FM on the old low band repeater transmitter, Thought it would do more on HF.
RF parts has them on stock as matched pairs. What do you think about graphite
replacements lets say for 811A for 572B graphite? curious to the plate
current comparison bewtween the two. It appears all my data is old and
does'nt show graphite info. KE4GQE
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