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 on: Today at 09:22:47 AM 
Started by KF5ZYS - Last post by KI8DJ
You could use an ultimax 100 end fed or other similar antennas with your tuner. They work on all bands with varying levels of efficiency. Eham has many reviews .

 on: Today at 09:18:39 AM 
Started by KD5GR - Last post by AA7RX
If it were not for the growing trend for there to be CC&Rs that mandate HOA control over every piece parcel and square foot of real estate unless said real estate has a land only value of over $200,000, the HOA and CC&R rules wouldn't be such a problem. Couple this with the tendency for "control freaks" to gravitate to HOA positions of power and control.

Such things as one HOA tried to ban homeowners (subjects, peons) from owning and driving pickup trucks in the fiefdom, another went after a homeowner because he was telecomuting for his software consutlting job, and they considered that to be an infringement of the no home businesses restrictions.

CC&R and HOA reasonable accomodation is definitely required for HOA and CC&R governed communities.

I don't live in such a place though I do have a fair number of CC&R restrictions on my rural acre. Replying from work as my internet is out from home for the Huh time.


I've been hunting for a new QTH for months now. The vast majority of the new homes come with onerous HOA contracts, most not allowing ANY antenna systems of any kind (even temporary or hidden ones) unless they are small satellite dishes.

I agree with KF7CG. The control freaks are usually the ones who put themselves in charge of enforcing the rules, and they often enjoy hunting down any perceived infractions.

This bill will help, if we can get it passed.

 on: Today at 09:18:27 AM 
Started by KA0CSL - Last post by WB2WIK
The Henry uses glass chimneys and a centrifugal blower which always operates when the amp is powered "on," and flows air through the tube sockets in the Eimac prescribed manner.  If the blower is operating at full speed and not clogged with dust or debris, the filament pins don't get terribly hot in this amp.

The 2K-2 also used 3-400Zs.  If you have the original ones, they'd have to be very old since they were discontinued from manufacture around 1970 or so, but I think you said your amp was from 1963 in which case original tubes would be 51 years old!  That's a really long time, and I'd expect them to be pretty shot by now if they're original.

If you have a shorted rectifier, obviously that must be replaced or the amp will never work and will just keep blowing fuses and breakers.

The amp cannot be operated on its side, as you discovered.  Don't do that.

The HV interlock "safety" switch can be defeated but I sure wouldn't recommend that.  There's normally no reason to adjust input tuning in these amps; the input networks are in cans that "plug in" to the chassis and as long as those are seated I can't imagine why they'd go bad or be mistuned.  They're very robust and were designed to handle the output power of more powerful exciters than you're using.  I've never seen one go bad or out of alignment.

 on: Today at 09:14:34 AM 
Started by WB0VRI - Last post by G4AON
You don't say if you will be carrying the battery in a backpack, or taking it to site by car. Obviously if using a car then you can take a lot more weight...

You would be doing a lot of serious operating if you are in QSO for a solid 8 hours at a time, you might want to look again at how much transmitting you would actually do.

I've covered battery size with "back of a cigarette packet calculations", and battery type for car portable with a 100 Watt transceiver at:

The issues are similar, regardless of power consumption. My biggest drain is the laptop.

73 Dave

 on: Today at 09:11:38 AM 
Started by N3QVQ - Last post by N3QVQ
Thanks for your comment. My rig is an IC-951A. I tried CW AM, and SSB, the meter on my radio showed that I had a carrier, but the meter on the MFJ-945C tuner never moved. I tried this with 15, 25, and 50 watts with the same results.There are 2 fast switching diodes (1N4148) in the circuit board of the tuner, I will have to pull them out from the board to test them.

73 Joe/N3QVQ

 on: Today at 09:05:23 AM 
Started by KB1WSY - Last post by KB1WSY
Unless the harmonics have been measured with a spectrum analyser, you won't know if it's legal or not. The fact someone may or may not have had a problem isn't that much of a good guide. An antenna tuner will certainly help.....Or see if you hear from the Famous Candy Company.....but it's a bit late then...

One possibility is to use a half wave filter for each band - then the match is relatively unimportant.

So what did Twelve-Year-Old Novice Builder do in 1969, lacking a spectrum analy(s/z)er? Or has the FCC become more stringent about harmonics? My general impression is if anything there is less of an issue because (a) TVI is less  of a problem now that TV Band I and III have been largely vacated of TV, and (2) the FCC seems to have fewer enforcement resources than in the days of yore (not that this is any excuse to break the rules).

I like the idea of a halfwave filter. I've always been intrigued by this one, which is two halfwave filters (40m and 80m) mounted inside a coffee can. It comes from "Understanding Amateur Radio," 1963 edition. I have a whole pile of those miniductors that I could use for this:

Quote from:  link=topic=97719.msg769853#msg769853 date=1405092957
I've always mounted these variable caps by the two front screws and have on occasion created the third at the 12:00 o'clock position by drilling and tapping a new 4-40 screw hole.  However, you found you had a problem and solved it in a remarkable way.  I studied your method of "hole layout" and compliment you on it.

Al (K8AXW): Thanks for the compliments. I don't have thread taps in my workshop and it's a good 40 years since the last time I tapped a thread! There were also some additional holes in the front of that capacitor, but they weren't tapped, so I would have had to insert a nut between the plates and the armature. But the nut would probably have been too thick and would have caught on the plates. BTW all the screws are #6.

Quote from:  link=topic=97719.msg769853#msg769853 date=1405092957
Oh, don't ever get put off by any comments or suggestions on "what you should have done" Martin.  This is just another version of "looking over one's shoulder" with the almost insatiable desire to grab it and doing yourself!   Grin

Don't worry, I won't be put off. Nearly all of the comments include useful information and tips to do things better. Furthermore, everyone knows I'm a relative beginner and they won't know what I already know, and what I don't already know. (Yeech, I'm sounding like Donald Rumsfeld.)

 on: Today at 09:04:22 AM 
Started by AA9RN - Last post by KD8W
I would like to know a few ideas on keeping the rubber/plastic caps on the ends of the elements.Any help before I put this in the air. Thanks Bruce

Hi Bruce , If you want, get a tube of clear plumbers-glue(the kind that dries and feels rubbery). It should hold
the caps on and you can still peel them off if you have to do any kind of repair on them.


 on: Today at 09:03:22 AM 
Started by KG7LWZ - Last post by WB2WIK
When you key the amp with NO drive applied at all (just key the amp, not the transmitter), what does the plate current rise to?

 on: Today at 09:02:47 AM 
Started by NN5O - Last post by K0BG
While the plug wires are indeed short, GM V8 engines are some of the noisiest when it comes to HF RFI. They're only surpassed by the HFI-type distributors of the 80s and 90s.

Hopefully, laser diode ignition will help the situation, but that's still a couple of years away, except of the Lexus LF sports car which gets is in 2016.

 on: Today at 09:01:53 AM 
Started by W4TL - Last post by W4TL
Here is some additional excellent reading on AFCI's  "AFCI's Come of Age" by Doug Hansen.

This article pretty well gives the history of the AFCI and explains the NEC Code affecting these breakers and how they have progressively being made more and more mandatory in interior living areas (they are already required in family rooms, dining rooms, living rooms, parlors, libraries, dens,bedrooms, sun rooms, recreation rooms, closets, hallways, or similar rooms or areas) This last move in the 2014 NEC will require them in more locations including kitchens and laundries. Look out refrigerators and freezers.

All amateur radio operators need to be made aware of the existence of these devices and the consequences that can occur.

Terry, W4TL Smiley

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