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  1. M

    Comp cobra 29

    Sorry but that's crap. There may be a higher average wattage on SSB/AM but there won't be a higher peak wattage. Anyone who thinks that there is is clearly not using the right kind of power meter to measure PEP. If the power meter claims to be able to read PEP without requiring a power supply...
  2. M

    Base Hex Beam for 11 Meters!

    I tried here with that file and got the same errors as you did. I assumed it was the same one I'd been using for the last several years which I got from his site. OK so here's the file I've been using with EZNEC ver 5.0 from my hard drive. It gives yellow errors but no red ones...
  3. M

    Comp cobra 29

    Because keydowns don't use spectrum analysers so it doesn't matter that most of the power being transmitted isn't actually on the channel the rig is set to. I've you've got a rig that's quite happy to spunk out harmonics over several dozen kHz you can get the amp it's driving to do just the same...
  4. M

    Cobra 29 ltd chrome with mosfet super tune

    Signal meters measure in dB, dBs are logarithmic. 3dB is double 6dB is quadruple 8dB is eightfold 10dB is tenfold. Also because of the way you add dB up a 20 times increase = 13dB. IARU standard is 6dB per S point however on a CB S meter one S point =3dB. Going from 4W to 20W will see your...
  5. M

    Base Hex Beam for 11 Meters!

    There's a CSV file from K4KIO knocking around on the interweb somewhere you can import into EZNEC for the non-broadbanded version. It surprises me that there were errors with the file I linked to. That was direct from G3TXQ's page and one he created. Was it possible to create a plot with the...
  6. M

    Oh dear. Got myself a McKinley EU, need some advice.

    Ah someone else who watches TRX Bench. Radios are like cars. I'm sure we can all agree the PT Cruiser is a stinking hideous looking pile of crap but there are people who love them. Conversely the Bugatti Veyron is unbelievable but to me they're butt ugly. From having hands on with quite a few...
  7. M

    Base Hex Beam for 11 Meters!

    Marconi... Here's an EZNEC file of the G3TXQ broadband hexbeam. http://karinya.net/g3txq/hexbeam/eznec2/g3txq_broadband_hex.EZ
  8. M

    Need a high power dummy load

    You won't find anything small and portable because it's got to dissipate 3kW of heat - as much as an electric heater puts out. MFJ do the MFJ-250 Versaload that is rated for 1kW continuous or 2kW PEP which is basically a bunch of resistors bolted in a paint tin which is full of transformer oil...
  9. M

    Oh dear. Got myself a McKinley EU, need some advice.

    I've used Lincolns in the past - got a dog of one brought in and realigned it to factory and managed to make a 4000 mile QSO with it which I put on Youtube. Basically it boils down to two things: 1) The fact I'm lazy and the McKinley has the UK FM band and keeps that even in export mode so I...
  10. M

    Oh dear. Got myself a McKinley EU, need some advice.

    So moving on. The only thing the shop adjust is the FM deviation which is understandable as EU limit in most countries is 2KHz, manufacturers typically set them to 1.5-1.8kHz to ensure they're legal but the UK limit is 2.5kHz so you'd sound quite quiet to everyone else if it wasn't increased. I...
  11. M

    Oh dear. Got myself a McKinley EU, need some advice.

    Yeah if I reduce the power as you described Shadetree I have to drop it right down to the minimum and then it starts to work as expected and the meters go the right way. I got hold of the service manual and had a look at the transmitter alignment section. It's screaming it's nuts off as I...
  12. M

    Oh dear. Got myself a McKinley EU, need some advice.

    The irony is that the shop who've done this have put their own warranty seals on after doing the wideband mod and I'm going to have to break them to sort it out. Is it just a case of cranking down the AM High Power adjustment? This is an image with all the adjustments on the EU version...
  13. M

    Oh dear. Got myself a McKinley EU, need some advice.

    Got a brand new President McKinley from Knights CB here in the UK. Had it widebanded so I could use it on 10m. Decided to check the power outputs today using my MFJ 993 and a dummy load. On AM it would appear to have "backwards swing" so you key up with no audio and the S meter on the McKinley...
  14. M

    Should I add a grounding strap to the antenna mount.

    That's simple. 1) As high as possible above the ground to reduce ground (as in the planet earth) losses. Doubling the height can give you as much as 6dB gain. 2) With as much horizontal metal as possible directly under the antenna so we maximise as much of the vehicle as we can and have current...
  15. M

    Should I add a grounding strap to the antenna mount.

    Takes me a similar amount of time. It can take me half a day just taking it out.
  16. M

    Mobile 102" whip tunes great, but other antennas won't

    When you were using the MFJ 259 and analysing his antenna how much either side of the 40 channels did you go? You need to sweep at least 1-2MHz below and above. If he's really got a very efficient ground it may be that at it's factory length it's actually resonant around 25-26MHz, way below Ch1...
  17. M

    In lieu of through hole mobile mounting...

    If it's purely for static mobile just get four lengths of wire, approx 9ft long (reduce by 5% if using insulated wire) and four long stakes. Hammer the stakes into the ground leaving three feet or so sticking out, bring the wires off the mounting bracket in a X pattern attaching them to the top...
  18. M

    SSB bandwidth question

    They'll have just used their clarifiers or RIT controls until he sounded right. Chances are he's a little off frequency. Unless you're running a TXCO oscillator in your transceiver usually a radio is slightly off, even amateur gear. Whilst it doesn't really make much difference on AM and FM it...
  19. M

    Great radio days can be few and far between but always worth the wait

    Got myself a shiny new President McKinley yesterday, dug my 20 year old Imax 2000 out - it's 24ft Marconi ;), popped it on the 20ft pole my Cobwebb used to sit on and had a blast on 11m this afternoon. Just spent 15 minutes having one of the best conversations I've had on radio for the longest...
  20. M

    Should I add a grounding strap to the antenna mount.

    He didn't say a rear bumper mount would be ideal. Too many ground losses, same problem of a lack of a ground plane under the antenna that the rack has, even more directional.