K2 Almost Ready

[Richard Arland]

Gang:

Had my first surgery on April 21, been lugging a cast around on my right foot ever since. Still have at least 3-4 weeks more with no weight bearing.

Therefore, I decided to put my "off-work" time to good use, bought a K2 with all the options except the battery and the 100W amp, and have been having a ball building and building and building.

We are at a work stopage due to a missing 2N5109 (Q5 pre-driver) transistor. It is Saturday night, of course, so it won't be here before Monday or Tuesday (thanks, Scott). And....I am chomping at the bit to get this thing all together, tested and on the air!

The 2N5109 subs out to an NTE 278, but I don't have one of those either. Anyone have a good non-NTE sub for this transistor that I just might have in my stock so I could get on with the testing of this rig. I'm already suffering from cabin fever and this isn't helping one bit!!!

Two things I am looking forward to: getting the K2 on the air and a shower! Can't shower with the cast on! I'm gettin' gammie, Cletus!

One other idea: has anyone tried marrying a Communications Concepts transistor linear up with a K2? They make several versions up to and incuding a 180W linear amp. These are PC boards and partial parts kits, not actual kit linears, so they fall within the FCC guidelines for ham linears that cover 10-11 meters.

vy 73

Rich K7SZ

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[Leigh L. Klotz Jr WA5ZNU]

I use a K5OOR Mosfet amplifier I built, with my K2 and KX1.  I get about
50W out with 2.5W in.
73,
Leigh / WA5ZNU
On Sat, 14 May 2005 11:01 pm, [hidden email] wrote:
> ...Communications Concepts transistor linear up with a K2?
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[Richard Arland]

Hi Leigh:

I have built one of these and use it with my FT-817. However, I wanted something a bit more powerful than the 38 W I get out of that particular linear that I could put into a matching K2 case.

Now, before all the flames start licking up around my privates, let me assure you that I have no real intention of using this amp on a regular basis. However, having said that, I have always wanted to undertake a medium power HF linear project (around the 200 W range) based upon transistor designs found in the Motorola RF book.

Communications Concepts sells several different board designs based upon the MFR-454/455 devices that will go up past 300W. I just think that it would be nice to have something around the 150/180 W range sitting next to the K2 in a matching enclosure. (That way I could "tickle" the 4CX10000 that sits beside the operating bench!)

vy 73

Rich K7SZ

>I use a K5OOR Mosfet amplifier I built, with my K2 and KX1.  I get about
>50W out with 2.5W in.
>73,
>Leigh / WA5ZNU
>On Sat, 14 May 2005 11:01 pm, [hidden email] wrote:
>> ...Communications Concepts transistor linear up with a K2?

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