Re: [Elecraft] [ELECRAFT] KPA500 NEW OWNER QUESTIONS.......

2019-02-28 Thread Bob McGraw K4TAX
This fellow seems to have a good handle on the ALC issue as it relates to overshoot in the transceiver. https://www.w8ji.com/alc_exciter_power_overshoot.htm Here Tom goes into the discussion of good ALC vs. bad ALC systems. https://www.w8ji.com/ameritron_alc_adjustment.htm 73 Bob, K4TAX

Re: [Elecraft] [ELECRAFT] KPA500 NEW OWNER QUESTIONS.......

2019-02-28 Thread Bob McGraw K4TAX
Yes, improperly or incorrectly using ALC with any amp or any transceiver, for that matter,  can and usually does produce distortion and splatter.   Just look at some of the signals on the bands and observe the ALC overshoot which exists with many radios.   And it is made worse by the addition o

Re: [Elecraft] KPA500 new owner questions.......

2019-02-28 Thread Bob McGraw K4TAX
When I read in the manual where it says "never exceed 40 watts" that leads me to believe one should not do that.   While the protection circuit is fast and there is a 3 dB attenuator that switches in automatically, from 100 watts down 3 dB is still over 40 watts.  I think I read here where some

Re: [Elecraft] KFL3C-400 offset?

2019-02-27 Thread Bob McGraw K4TAX
Grant et al; I can agree that many hams do not understand the application of "filters" in a radio, specially today with the advancements in DSP technology.  I find today that many many hams rely on "old school methodology" to justify what they do.  They, for the most part, seem to shy away fr

Re: [Elecraft] No FT8 Decodes pn 80 Meters

2019-02-25 Thread Bob McGraw K4TAX
I have and use the same configuration as you describe.   Make sure both VFO A and VFO B are in the same mode.   Be sure you are in DATA A mode.   With DATA A mode it is a USB mode  as used for FT-8. The right side of the display on the radio should show SPLIT just above the VFO B frequency, th

Re: [Elecraft] OT: Astron linear PS regulation issues

2019-02-25 Thread Bob McGraw K4TAX
I have personally found several instances in power supplies I either own or have repaired where the green power wire lug is firmly attached by the bolt and nut.   It however was nicely insulated by the paint!. Visual inspection is the best way to determine if an issue exists.  Do take time

Re: [Elecraft] K-3 Power Output

2019-02-24 Thread Bob McGraw K4TAX
Check the Power Set Per Band setting in the K3 config menu. Should not be set to NORmal. 73 Bob, K4TAX On 2/24/2019 2:07 PM, Jim McCook wrote: One of the features I liked with the K-3/KPA-1500 combo was having power setting in the K-3 remain at 100w for barefoot or amplifier STBY position. 

Re: [Elecraft] kpa1500

2019-02-23 Thread Bob McGraw K4TAX
My KPA500 displays the temperature in degrees Centigrade.   Just remember, small numbers cooler, larger numbers hotter.  Normal room temp is about 23 to 25 degrees C.  The fan switches on at 50, steps up at 55, steps up at 60 and steps up at 65.as I recall.  The book says maximum temper

Re: [Elecraft] K3- To zero beat or not to zero beat

2019-02-22 Thread Bob McGraw K4TAX
This is a good method.   See my article in ARRL QST, September 2015, TRANSMIT AND RECEIVE ON FREQUENCY.   I suggest using software for PSK-31 as the AFC will always lock onto the audio frequency and then show the actual frequency.  It is usually good for 1 Hz resolution. 73 Bob, K4TAX On 2/

Re: [Elecraft] K3- To zero beat or not to zero beat

2019-02-22 Thread Bob McGraw K4TAX
The method I've used to check my K3S, put the radio in CW mode, tune to each WWV frequency and then press SPOT.   The automatic SPOT function will bring the radio to the WWV frequency +/- 1 Hz. The SPOT function matches the receiver sidetone offset of the WWV carrier and the audio of WWV is not

Re: [Elecraft] To zero beat or not to zero beat

2019-02-21 Thread Bob McGraw K4TAX
Most of my CW work is on nets.   Otherwise, pse QNZ.   If one is not on frequency, one is not heard. 73 Bob, K4TAX On 2/21/2019 6:54 PM, Jim Brown wrote: On 2/21/2019 4:04 PM, Bob McGraw K4TAX wrote: And in a pileup the RX bandwidth is narrower.  At 50 Hz BW any 12 to 15 Hz away aren&#

Re: [Elecraft] To zero beat or not to zero beat

2019-02-21 Thread Bob McGraw K4TAX
g Day. > > tnx > Mike / W5JR / GQP N4N > Alpharetta GA > > >> On Feb 21, 2019, at 5:33 PM, Bob McGraw K4TAX wrote: >> >> I use the SPOT feature on my K3S to zero beat the carrier on WWV. This >> gets me to +/- 1Hz. If it is more I'm inclined

Re: [Elecraft] To zero beat or not to zero beat

2019-02-21 Thread Bob McGraw K4TAX
I use the SPOT feature on my K3S to zero beat the carrier on WWV. This gets me to +/- 1Hz. If it is more I'm inclined to tweak the reference such that it is accurate. As to posting spots, I usually post to the nearest 1 KHz. Thus from experience, I have little confidence in the display

Re: [Elecraft] Searching for Noise (i.e., Samples Thereof)

2019-02-18 Thread Bob McGraw K4TAX
One of the first things to do is isolate the noise to two sources in general.   (a) inside the house, (b) outside the house. My approach is to use the 12V battery off of the lawn tractor to power the transceiver.  Use the antenna and band which provides the worst noise.  Then pull the main bre

Re: [Elecraft] Coax Switches

2019-02-17 Thread Bob McGraw K4TAX
Smart man and decisions and the way to do things correctly.  Glad to see this. 73 Bob, K4TAX On 2/17/2019 9:38 AM, James F. Boehner MD via Elecraft wrote: I use the Alpha Delta Series. They have SO-239 and "N" connector models, two position or four position. For the price difference, I a

Re: [Elecraft] Removing/connecting PL-259s

2019-02-16 Thread Bob McGraw K4TAX
Don et al: That is the  best idea!   Plus if one has a adequate outside lightning protection system, properly bonded to the AC mains, and then disconnects inside where they use a coax switch with gas discharge tubes and a grounding position, they are negating part of the system protection. 7

Re: [Elecraft] KPA3A Failure & related

2019-02-16 Thread Bob McGraw K4TAX
This discussion has risen its nasty head earlier.  Wes and I exchanged several private e-mails on the topic.  Here is what I've learned: My purchased new from the factory my K3S -100 in August of 2015. With it I drove my AL-80B with 60 to 80 watts for some two years.   Absolute no issues of co

Re: [Elecraft] KPA-1500 failed!

2019-02-16 Thread Bob McGraw K4TAX
Do not trust PL-259 connectors installed only "finger tight". Today many of those PL-259 connectors "look good" but are really poor quality connectors.    ALWAYS snug the PL-259's with a pair of 4" channel lock pliers.   You'd be amazed how many strange issues will go away. Not saying this is

Re: [Elecraft] KIO2 RS-232 to USB?

2019-02-14 Thread Bob McGraw K4TAX
>From experience I find the units from R T Systems are 100% reliable. Much more >so than the office supplies, electronics stores, Walmart and such. Plus if you >have questions, a phone call allows one to speak with a real person in the >USA. Bob, K4TAX Sent from my iPhone > On Feb 14, 2019,

Re: [Elecraft] KAT500 refuses to turn on

2019-02-14 Thread Bob McGraw K4TAX
I called Elecraft and ask if they would send the schematics for my KAT500 and my KPA500.   In about 30 minutes they were in my e-mail in box.  Very high quality printouts now reside in my manuals. 73 Bob, K4TAX On 2/14/2019 11:03 AM, Tony Brock-Fisher via Elecraft wrote: On 2/14/2019 9:38

Re: [Elecraft] KAT500 refuses to turn on

2019-02-14 Thread Bob McGraw K4TAX
I'd start by opening the box and check the input and output of the regulator, U4, being a LM7805.   Should have ~12V on the input and 5V on the output.  If there is not 12V on the input then check both sides of the diode, D8, which is in series with the 12V input.  Also there is an inductor/cho

Re: [Elecraft] Anyone use Solar Power for your ham shack?

2019-02-13 Thread Bob McGraw K4TAX
I installed a solar panel and required charge controller in our RV.    While it works quite well for its purpose, when I  use the HF radio the thing must be turned off.  Seems those switching charge controllers in their plastic boxes and with multiple wires running everywhere do generate noise

Re: [Elecraft] KPA1500 vs SPE Amps

2019-02-12 Thread Bob McGraw K4TAX
I'd be interested in the IMD figures with this configuration. Are the amps being driven hard wire / parallel at the inputs or from a power divider?   And how are the outputs summed?  Power divider?   How much loss is in the output summing network?   And is it broadband 160M - 6M? Another tho

Re: [Elecraft] TRS connectors - Heil Foster adapter

2019-02-11 Thread Bob McGraw K4TAX
What ever happened to the idea of making ones own mike cables? Two connectors, plus a length of 2 conductor shielded cable and a bit of careful soldering, specially on the Foster plug.    Just use a good quality XLR connector such as Cannon or Neutrik.  It isn't "rocket science" and it is much

Re: [Elecraft] K3S boom mic ensemble options.

2019-02-10 Thread Bob McGraw K4TAX
Best advice.down load the K3S manual from the Elecraft website.   You'll need to read it 3 or 4 times before you get the radio.  It has info about all the connections, front panel and rear panel.   And will familiarize you with the menus and controls.    It is easy to understand and onl

Re: [Elecraft] K3S boom mic ensemble options.

2019-02-10 Thread Bob McGraw K4TAX
The point a bit confusing to me was the expression "boom mic set".   Is the requirement for a mike boom and a mike with a cable?   Or is the requirement for a headset, which I take to be headphones with a mike on attached boom? I've one of these desk booms I've used very satisfactorily support

Re: [Elecraft] K3S boom mic ensemble options.

2019-02-09 Thread Bob McGraw K4TAX
-16 dB and 400 Hz about -3 dB to -6 dB.  You'll sound like Don Pardo...assuming you have the pipes. 73 Bob, K4TAX On 2/9/2019 6:48 PM, Walter Underwood wrote: On Feb 9, 2019, at 1:57 PM, Bob McGraw K4TAX wrote: The Yahama C-500 and the Koss SB-40 are two good ones. Not expensive but

Re: [Elecraft] K3S boom mic ensemble options.

2019-02-09 Thread Bob McGraw K4TAX
The Yahama C-500 and the Koss SB-40 are two good ones.   Not expensive but comfortable and good sounding for both the mike and the earphones.  Either works very well with the K3S.   I know, I have all of them.  My preference is the Koss SB-40 over the Yamaha C-500. 73 Bob, K4TAX On 2/9/201

Re: [Elecraft] K2: I killed my KPA100

2019-02-07 Thread Bob McGraw K4TAX
I've always said "new only guarantees newnot necessarily good". That's one reason why companies supply a warranty with a new product.  They expect some failures and some to be dead out of the box. 73 Bob, K4TAX On 2/7/2019 6:41 PM, Jim KO5V wrote: Don, It is all working again! The

Re: [Elecraft] 160 unusual conditions.

2019-02-04 Thread Bob McGraw K4TAX
I all that a PICNIC. "Problem In Chair Not In Computer". Bob, K4TAX Sent from my iPhone > On Feb 4, 2019, at 11:12 AM, Petr, OK1RP/M0SIS wrote: > > "Heard ZL4AS yesterday using FT8 between 0815 and 0825." > > ...so you did not heard him just your PC decoded it, right? > > Do not want to

Re: [Elecraft] Tx distortion

2019-02-02 Thread Bob McGraw K4TAX
Don't forget about the length of the ground conductor as well. I've seen and found more than one instance where the ground conductor was a 1/4 wavelength on the band which caused RFI in the station.   That puts the station at 1/4 wave or a maximum voltage point above ground.  It was acting like

Re: [Elecraft] K3S 6M Tune Pwr

2019-02-02 Thread Bob McGraw K4TAX
Thanks guys for the verification on your radios. I've tried it with TUNE power at different values, 5W, 10W, 20W, & 30W.   In all cases, the value for other bands is as selected, except for 6M where it is always 70% of the selected TUNE power.   With this, I figure it is a firmware issue. St

[Elecraft] K3S 6M Tune Pwr

2019-02-02 Thread Bob McGraw K4TAX
I've seen consistently that the 6M TUNE power on my K3S, s/n 10163 defaults to 16 watts.   I have set the TUNE power at 20 watts and it performs correctly on all bands except 6M.   I've completed the TX Power Calibration with the K3 Utility.  All looks good there.    I have PWR Per Band set suc

Re: [Elecraft] K3s & P3 used with Data

2019-02-01 Thread Bob McGraw K4TAX
Thanks and always glad to assist.   And glad you have the issue resolved. 73 Bob, K4TAX On 2/1/2019 9:22 AM, Bob wrote: Both Bob K4TAX and Bill NR4C figured out the problem... I've been using my K3s for a few years on all bands except 60 meters. So my original setup was from a long time ago.

Re: [Elecraft] K3s & P3 used with Data

2019-01-31 Thread Bob McGraw K4TAX
Yes and as Jim wrote, band allocations vary from one country to another.  For this reason the 60M frequencies are not included in the standard FREQUENCY Table in WSJT-X.   Therefore, one must manually enter the frequencies in the Frequency table.  Just right click anywhere in the table and a se

Re: [Elecraft] K3s & P3 used with Data

2019-01-31 Thread Bob McGraw K4TAX
That is normal to comply with the 60M frequency and BW allowed. 73 Bob, K4TAX Sent from my iPhone > On Jan 31, 2019, at 5:15 PM, Bob wrote: > > I've been using my K3 & K3s for years using the DATA mode. It has worked > as if it were in the USB mode, and shows on the P3 scope to the right of

Re: [Elecraft] KAT500 Utility Operate -> Memorize

2019-01-28 Thread Bob McGraw K4TAX
The tuner will memorize the antenna selection and matching elements every time it tunes. As to the Utility, what ever you change in the Utility will be be sent to the tuner when Memorize is selected.     Not it is not necessary to hit Memorize every time the tuner resolves a match. 73 Bob,

Re: [Elecraft] CM500 Mic ?

2019-01-28 Thread Bob McGraw K4TAX
Yes but..when one looks at the SPECS  one will see "Microphone Type:    Dynamic".    I guess one could consider that to be "electric". 73 Bob, K4TAX On 1/28/2019 8:19 PM, j...@kk9a.com wrote: The manufacture says it is a sensitive electric microphone: https://usa.yamaha.com/products/musi

Re: [Elecraft] CM500 Mic ?

2019-01-28 Thread Bob McGraw K4TAX
Yes I always find it interesting they include a battery pak but say it's dynamic. Most all of the descriptions I've seen indicate it is a dynamic mike. No it's an Electrect element. Bob, K4TAX Sent from my iPhone > On Jan 28, 2019, at 4:07 PM, Mike - W5JR wrote: > > That explains where

Re: [Elecraft] CM500 Mic ?

2019-01-28 Thread Bob McGraw K4TAX
Just goes to show, one can't believe what they read on the internet. 73 Bob, K4TAX On 1/28/2019 1:52 PM, Walter Underwood wrote: The published docs on the CM500 are a mess, but it is an electret. It even comes with a battery pack so you can use it with non-powered mic jacks. wunder K6WRU

Re: [Elecraft] CM500 Mic ?

2019-01-28 Thread Bob McGraw K4TAX
I recall that it is Electrect.  Should plug in direct on the back panel of the radio.  Just turn on the BIAS. 73 Bob, K4TAX On 1/28/2019 1:26 PM, Paul Ecker wrote: Does anyone know if the CM500 has a Electret or Dynamic mic? 73 Paul w2eck _

Re: [Elecraft] KAT500/KPA500 issue

2019-01-27 Thread Bob McGraw K4TAX
Sure sounds like an antenna problem.    Check the system on a dummy load. 73 Bob, K4TAX On 1/27/2019 7:10 AM, Jack Satterfield wrote: After 5 years of perfect operation, now a very strange issue Bypass SWR 3 or 4:1 KAT500 tunes to 1.3:1 Switch amp to operate, operating SBB on first voice K

Re: [Elecraft] KPA500 Assembly Help

2019-01-26 Thread Bob McGraw K4TAX
There is NOTHING like getting automatically an answer from the company and the person that designed the ampon a Saturday morning!    Thanks Jack. 73 Bob, K4TAX On 1/26/2019 10:56 AM, Jack Brindle via Elecraft wrote: Ah, but you came to the right place to get an Elecraft answer! Us

Re: [Elecraft] KAT500/KPA500 - Sanity Check Please

2019-01-26 Thread Bob McGraw K4TAX
My station is a K3S, KPA500, KAT500.    The antenna is a 250 ft center fed wire with 450 window line that runs from the feed point on the antenna all the way to the operating position where the 450 line terminates into a 1:1 current balun on the shelf just above the amp and tuner.  I use a comm

Re: [Elecraft] Auto-spot, tuning aids, and the arcane history of CW pitch-matching

2019-01-23 Thread Bob McGraw K4TAX
I've never had a drift issue with any of my modern transceivers on 28MHz as the IF. Now the TCXO drift in the transverters is real issue. Bob, K4TAX Sent from my iPhone > On Jan 23, 2019, at 7:08 PM, ab2tc wrote: > > Hi, > > It doesn't "compound". A 10Hz drift at the antenna output of the

Re: [Elecraft] Auto-spot, tuning aids, and the arcane history of CW pitch-matching

2019-01-22 Thread Bob McGraw K4TAX
Another trick which works well.   Tune to a WWV frequency in CW mode.  Press SPOT and the radio will jump on the exact carrier frequency.   The SPOT function can pull on to the WWV frequency as far away as about 100 Hz.  Once the radio has  resolved SPOT, the readout / display is the frequency

Re: [Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.

2019-01-20 Thread Bob McGraw K4TAX
This all works with Windows 10 Pro.    I've not used the Home edition. 73 Bob, K4TAX On 1/20/2019 6:14 AM, Andy Durbin wrote: "Hope you check your windows setting, you might be surprised." No surprises here. I have never had my rig CODEC as the default sound playback device. I don't have W

Re: [Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.

2019-01-19 Thread Bob McGraw K4TAX
So what happens if you don't run Win4K3Suite?   I run WSJT-X and nothing else and have NO issues with audio, control, or Windows sound.  I find that WSJT-X handles everything that is needed, radio control, audio control, and logging. Conclusion:  More software applications running = more issue

Re: [Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.

2019-01-19 Thread Bob McGraw K4TAX
This type of discussion makes me wonder if folks are feeding audio direct from the computer to the Line IN on the rear or to the MIC input.  If they are using an external soundcard, i.e. Signalink or such, then I can understand Windows sounds being heard.  Not good. If they are using the USB m

Re: [Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.

2019-01-19 Thread Bob McGraw K4TAX
Yes CAT can be somewhat confusing IFyou are running multiple applications at the same time.   Otherwise, I use CAT for: WSJT-X, FLDIGI, HRD/DM780, MMTTY and have zero issues with any of the applications or levels or commands.   And all were easy to configure and are reliable.  When I lo

Re: [Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.

2019-01-19 Thread Bob McGraw K4TAX
blems setting up CAT for their radios give this a try and see how > well it works. And BTW: I do use FT8 fairly regularly as well as RTTY and > PSK31. > > 73, > Barry > K3NDM > > -- Original Message -- > From: "Bob McGraw K4TAX" > To: elecraft

Re: [Elecraft] KAT 500 and open wire

2019-01-19 Thread Bob McGraw K4TAX
I didn't measure significant increase in loss with clean water i.e. tap water sprayed on the entire length of the line from a hose.  I did make a solution of dish washing detergent and water and , using a spray bottle, sprayed that on the line.  This caused much more water to cling to the line.

Re: [Elecraft] K3s can only transmit wsjt if the K3s codec is windows default.

2019-01-19 Thread Bob McGraw K4TAX
Are you saying the K3S does not go into the transmit mode, or are you saying there is no audio? From the K3S CONFIG menu you should have RS232 set to USB.  The K3S Menu should have MIC SEL set to Line IN.  Is anything plugged into the Line In on the back of the radio?   Unplug it if  so. The r

Re: [Elecraft] KAT 500 and open wire

2019-01-18 Thread Bob McGraw K4TAX
Using matching transformers and my spectrum analyzer with tracking generator, I measured a 100 ft length dry and I measured it wet.   My measurements indicated the velocity factor changed when wet, i.e. the electrical length of the line changed.  Thus explains to me the reason to "retune" when

Re: [Elecraft] WSJT-X Frequency Anomaly

2019-01-18 Thread Bob McGraw K4TAX
One easy method is place the radio on the CW mode. Time to one of the WWV frequencies. Press the SPOT to activate the function. Any difference between the WWV frequency and the readout is the error. Bob, K4TAX Sent from my iPhone > On Jan 18, 2019, at 4:42 PM, Mike Harris via Elecraft > wr

Re: [Elecraft] WSJT-X Frequency Anomaly

2019-01-18 Thread Bob McGraw K4TAX
There is a Freq Cal mode in WSJT-X.   I suggest if the radio or sound card is in question, run this mode and determine the results.  Bet you'll be surprised at the inaccuracy of the digital readout on a radio and or soundcard.   I was! 73 Bob, K4TAX On 1/18/2019 3:23 PM, Don Wilhelm wrote:

Re: [Elecraft] KPA500 external mains switch

2019-01-18 Thread Bob McGraw K4TAX
craft-boun...@mailman.qth.net On Behalf Of Bob McGraw K4TAX Sent: Friday, January 18, 2019 10:30 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 external mains switch I have a whole house surge protector installed at the Mains breaker panel.  Thus I find no need to have individual

Re: [Elecraft] KPA500 external mains switch

2019-01-18 Thread Bob McGraw K4TAX
If lightning is the item of concern, there's bigger fish to fry in that regard.  Lightning protection is an entire other story and a very specific approach to lightning mitigation. I use the word "mitigation" to emphasize the point that all efforts for lightning protection is an effort to "

Re: [Elecraft] KPA500 external mains switch

2019-01-18 Thread Bob McGraw K4TAX
I have a whole house surge protector installed at the Mains breaker panel.  Thus I find no need to have individual surge protection for any of the equipment locations in the QTH.   This takes care of microwave, range, furnace, washer, radios, TV's, entertainment systems, phone system and such.

Re: [Elecraft] KX2 Filter Bandwidth issue - Resolved

2019-01-16 Thread Bob McGraw K4TAX
I have experienced issues where a computer and the application software left fragments of data in the radio.  Not specific to the KX2 but could be.   From your description it seems the radio was in FSK mode.  That performs as you described which is a function of APF. I have found in most cases

Re: [Elecraft] Battery Low K3

2019-01-16 Thread Bob McGraw K4TAX
Perhaps someone will come up with  petite or very tiny jumper cables.  That might solve the Low Battery issue.   Maybe a "jumper cable kit".     :-) 73 Bob, K4TAX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinf

Re: [Elecraft] K3s Line Out (stereo)

2019-01-16 Thread Bob McGraw K4TAX
I agree but in the case of using two radios, two pair of headphones, a switching system and getting hum indicates a serious deficiency in the station interconnection and ground scheme. Everything should be at the same potential, thus no current would flow.   As they say "sum-tin not right". 7

Re: [Elecraft] K3s Line Out (stereo)

2019-01-16 Thread Bob McGraw K4TAX
I see no need for isolation transformers with headphones.  Likely the transformers is the reason the HP output won't drive a pair of headphones.   Isolation transformers?  Are they 3 winding hybrid transformers?    I've used them in professional audio installations but they are rare and expensi

Re: [Elecraft] Phillips screwdrivers

2019-01-15 Thread Bob McGraw K4TAX
Just be glad they don't use TOTSU screws typical of many Japanese products. i.e  the dot and slot ones.    Find one of those screwdrivers at Harbor Freight. 73 Bob, K4TAX On 1/15/2019 11:04 AM, Arthur Nienhouse wrote: */Don Good advice on shinny  Phillips drivers. Are the screws in the

Re: [Elecraft] New DSP features?

2019-01-13 Thread Bob McGraw K4TAX
And for this reason I choose to use SPLIT in CW mode as opposed to RIT.  Thus SPOT only affects the received signal frequency which is VFO A and I can tune VFO A as needed just like RIT. Thus VFO B is always the transmit frequency and is not affected by the SPOT function. 73 Bob, K4TAX On 1/

Re: [Elecraft] Slightly Unbalanced dipole?

2019-01-13 Thread Bob McGraw K4TAX
Al: Al et al; I do agree.   And in fact my 250 ft center fed antenna  with 75 ft of window feedline terminates at the operating position into a Balun Designs 1171T. Then a coax jumper of about 2 ft long, which is actually a model 8232 from The Wireman, Common Mode Choke between the balun and

Re: [Elecraft] Slightly Unbalanced dipole?

2019-01-13 Thread Bob McGraw K4TAX
That's why I use the statement "xxx ft center fed wire with balanced feed". I do have the ability to measure the current in each side of the feedline. As long as it is within 5%, about the limits of accuracy of measurements, I'm happy. Bob, K4TAX Sent from my iPhone > On Jan 13, 2019, at

Re: [Elecraft] Slightly Unbalanced dipole?

2019-01-13 Thread Bob McGraw K4TAX
To answer the question "Could a couple of inches or so difference in the length of the legs of a dipole ever work in your favor?"..depends on the frequency.  For lower frequencies likely NO, for higher frequencies maybe YES.  Thus 2" for a 160M dipole would be 0.066% while 2" for a 10M dipo

Re: [Elecraft] KPA500 & Drake TR7

2019-01-12 Thread Bob McGraw K4TAX
If you can run 200 watts PEP with the TR7, why run a 500 watt amp?    Otherwise, you'll need a 10dB attenuator between the TR7 and the KPA500.  Hence turn 180 watts of RF from the TR7 into heat as it takes only about 20 watts to drive the KPA500 to rated output. 73 Bob, K4TAX On 1/12/2019

Re: [Elecraft] Query for new DSP features

2019-01-12 Thread Bob McGraw K4TAX
Use external audio processing, otherwise a compressor or limiter, with variable attack and release and threshold and ratio controls.   Then follow that with a small power amp to drive an external speaker.     Frankly, I doubt you'd like the results. I find it better to not use the NR feature d

Re: [Elecraft] Sorta OT - assistive technology assistance

2019-01-11 Thread Bob McGraw K4TAX
Been there, done that.  Too smart and too old to do it again. Buying is better.   Operating what one has purchased is more fun. Better yet, learning to operate what one has purchased is very gratifying. 73 Bob, K4TAX K3S, P3, KPA500, KAT500 On 1/11/2019 6:42 PM, Bill Frantz wrote: Real hams

Re: [Elecraft] K3 TX power overshoot

2019-01-11 Thread Bob McGraw K4TAX
I occasionally see a wee bit of overshoot as seen on my KPA500. I'm driving it from my K3S at about 20 watts for about 400 watts out on SSB.  Occasionally I'll see a 450 or 500 watt indication on the LED bargraph.  The KPA500 doesn't seem to mind. If I set the drive power to 20 watts CW mode,

Re: [Elecraft] whats a updated K3 called?

2019-01-11 Thread Bob McGraw K4TAX
Clarification: The Tentec Omni VI Plus is not the same as the Tentec Omni VI, opt 3.  There is a difference, in model number and performance and features.  Thus from my take, a K3 upgrade is just that, a K3 that has the recommended factory upgrades installed.    And a K3S is a K3S that can on

Re: [Elecraft] whats a updated K3 called?

2019-01-11 Thread Bob McGraw K4TAX
I'd say it is called and "updated K3".   The K3S is different and my understanding is that a K3 can not be updated to be a K3S. All abet similar, in the end, they are different radios.    For that fact alone, the reason I purchased a K3S and not a K3 73 Bob, K4TAX __

Re: [Elecraft] KAT3A & KIO3B Upgrade for my K3

2019-01-10 Thread Bob McGraw K4TAX
I've attempted to configure MMTTY to run FSK with my K3S. Conclusion is that a Terminal unit will be required. Using AFSK is easy and I don't find any disadvantages. No additional hardware required. Bob, K4TAX Sent from my iPhone > On Jan 10, 2019, at 4:57 PM, Nr4c wrote: > > None that

Re: [Elecraft] ERR TXF

2019-01-10 Thread Bob McGraw K4TAX
Normal for most radios due to carrier frequency and receiver offset for CW. Elecraft is not the only that does it this way. As filters with reduced bandwidth we find that group delay increases. With this CW wave shapes become a difficult task. Wider filters are much easier to generate good q

Re: [Elecraft] Yama CM-500 Replacement

2019-01-09 Thread Bob McGraw K4TAX
With regard to "constantly plugged/unplugged",   I leave mine plugged in the rear of my K3S all of the time.  I use the PF2 function configured to switch between SPKR on/off and Headphones and  switch the mike from the front to the rear being the boom mike on the headphones.    No adapters requ

Re: [Elecraft] Yama CM-500 Replacement

2019-01-09 Thread Bob McGraw K4TAX
I have and use the Koss SB-40.  I get great audio reports. Yes, I agree,  if the mike is not positioned correctly and the TX EQ not set correctly, it can sound bad.   So can any other mike where good mike technique and application is not correctly used. 73 Bob, K4TAX On 1/8/2019 11:51 PM, W

Re: [Elecraft] Yama CM-500 Replacement

2019-01-09 Thread Bob McGraw K4TAX
I suggest another set of CM-500's.    They may last 2 years, 5 years or 10 years before they are headed for the trash.   Just look at it as a consumable item and that is just the cost of ownership. 73 Bob, K4TAX On 1/8/2019 9:00 PM, James Bennett via Elecraft wrote: Sad to say, but my trusty

Re: [Elecraft] New tuning knob for the KX2

2019-01-08 Thread Bob McGraw K4TAX
Regardless of what is added, how it works, or what it does, there will always be those that like it. And likewise, there will be those that object and won't like it. It needs to fit the needs of the masses. I've worked systems both ways. I like it the way it works at present. 73 Bob, K4TAX

Re: [Elecraft] KAT 500 and open wire

2019-01-07 Thread Bob McGraw K4TAX
I use the "window line" for 3 of my antennas. We have less than 125 days/ yr with precipitation of all types. The "loss wet" is a non issue in my thinking as I'm sure would be about the same for most folks. Still with extreme loss, under most conditions, coax will have greater loss. Bob, K

Re: [Elecraft] KAT 500 and open wire

2019-01-07 Thread Bob McGraw K4TAX
They are a voltage type, 4:1 designed to feed a folded dipole. There are actually 4 windings, 2 on each coil. If you want to see the best in balun usage and efficiency, a folded dipole typically has some 200 to 300 ohms impedance when constructed from open wire line or like materials.    Thus

Re: [Elecraft] KAT 500 and open wire

2019-01-06 Thread Bob McGraw K4TAX
I agree with Jim on this point.   I have means to measure current in each side of the balanced feed line.  And I have means to measure the voltage on each leg and observe the phase difference in each leg.  A dual trace scope with 2 current probes is the basic configuration.  If the currents are

Re: [Elecraft] KAT 500 and open wire

2019-01-06 Thread Bob McGraw K4TAX
I agree with Jim on this point.   I have means to measure current in each side of the balanced feed line.  And I have means to measure the voltage on each leg and observe the phase difference in each leg.  A dual trace scope with 2 current probes is the basic configuration.  If the currents are

Re: [Elecraft] KAT 500 and open wire

2019-01-06 Thread Bob McGraw K4TAX
Correct on all points. That is the reason I gave my feedline type, and length and antenna length alone with specific balun type and common mode choke type.   Any old ragged combination of chunks of wire and feed line is not assured to work and is largely the reason many hams shy away from bala

Re: [Elecraft] KPA500 - Not Going To Full Power

2019-01-06 Thread Bob McGraw K4TAX
First would seem that something in the antenna system is causing a problem.    I run my KPA500 & KAT500 at 450 to 550 watts out without any issues.  What's the antenna and feed line being used?   What bands?  Is the output of the FLEX surging as well? 73 Bob, K4TAX On 1/6/2019 3:36 PM, fyr

Re: [Elecraft] KAT 500 and open wire

2019-01-06 Thread Bob McGraw K4TAX
Yes I use a balanced feed line being the "window" type line.   It feeds a 250 ft wire in the center at 50 feet.  I have about 75 ft of feed line from the center of the antenna then,  through the attic eve vent, supported on some wooden hangers I made and attached to the roof rafters.   Then it

Re: [Elecraft] display PA temp?

2019-01-04 Thread Bob McGraw K4TAX
What amp? With mine I just press TEMP on the front of the amp. 73 Bob, K4TAX On 1/4/2019 8:40 PM, Jamie WW3S wrote: I seem to recall there is a way to display the PA temp but cant find the setting to do that. __ Elecraft mailin

Re: [Elecraft] KPA500 Hum

2019-01-04 Thread Bob McGraw K4TAX
ifferent circuits, are in operation. --mark/ae0mm ‐‐‐ Original Message ‐‐‐ On Friday, January 4, 2019 8:14 AM, John_N1JM wrote: Thanks Bob. Yes great amp. 73, John N1JM Bob McGraw - K4TAX wrote Yes it is normal to hear a slight hum when the Mains switch is on.  Also the left side may

Re: [Elecraft] KPA500 Hum

2019-01-04 Thread Bob McGraw K4TAX
Yes it is normal to hear a slight hum when the Mains switch is on.  Also the left side may be slightly warm.    When the Mains switch is on, the low voltage power supply is on.    This supply is for the logic and processing. See the IMPORTANT section on page 14 of the manual for further detail

Re: [Elecraft] K3 Standard internal Noise

2019-01-03 Thread Bob McGraw K4TAX
at give trouble.  If you cut off the connectors and use Amphenol connectors you will usually have a 'quality' cable. 73, Don W3FPR On 1/3/2019 3:22 PM, Bob McGraw K4TAX wrote: DX Engineering has the following: https://www.dxengineering.com/parts/dxe-8xdb002 73 Bob, K4T

Re: [Elecraft] K3 Standard internal Noise

2019-01-03 Thread Bob McGraw K4TAX
DX Engineering has the following: https://www.dxengineering.com/parts/dxe-8xdb002 73 Bob, K4TAX On 1/3/2019 1:53 PM, Buck wrote: Where did you find "quality" cables? Buck, k4ia Honor Roll 8BDXCC EasyWayHamBooks.com __ Elecraft

Re: [Elecraft] [FS] KX3

2019-01-01 Thread Bob McGraw K4TAX
I always sell for a price and state that the buyer pays packing and shipping charges.   I don't recall ever loosing a sale due to those terms.   I use a commercial packing service and can always quote the packing and shipping charges once the destination is known. In general I find USPS Priori

Re: [Elecraft] How to Isolate 2nd Transceiver in two Radio Base Station (WU6R / Mark)

2019-01-01 Thread Bob McGraw K4TAX
Think Field Day where it is normal to run several transceivers at the same time. Antenna separation and orientation is a key factor plus good quality band pass filters for each radio. Bob, K4TAX Sent from my iPhone > On Jan 1, 2019, at 11:27 AM, wrote: > > Two transceivers is a typical c

Re: [Elecraft] Ideas for an FT8 Radio

2018-12-30 Thread Bob McGraw K4TAX
My interest is already diminished to zero. 73 Bob, K4TAX On 12/30/2018 7:56 PM, Devin Butterfield wrote: I also agree that a one-mode radio wouldn’t be of interest for very long. __ Elecraft mailing list Home: http://mailman.qth.net

Re: [Elecraft] KAT500/KPA500 with Icom 7600 accessory cable

2018-12-30 Thread Bob McGraw K4TAX
I have followed this discussion with interest.    I do agree with Jack the issue seems to be related to a grounding issue.  And I agree with Jim as his assessment likewise.   His work and that of W. Silver from ARRL does support this thinking.   [The ARRL publication Grounding and Bonding for T

Re: [Elecraft] How to unsubscribe from reflector?

2018-12-29 Thread Bob McGraw K4TAX
some companies that would be cause for termination. Sent from my iPad On Dec 29, 2018, at 1:30 PM, Bob McGraw K4TAX wrote: I have a small COMPOSITION notebook by my computer.   It contains all of the USER and PASSWORD information for every account I use. Each page is designated for a user

Re: [Elecraft] How to unsubscribe from reflector?

2018-12-29 Thread Bob McGraw K4TAX
I have a small COMPOSITION notebook by my computer.   It contains all of the USER and PASSWORD information for every account I use. Each page is designated for a user site and there is plenty of room to write down the current password for that account.   And I do change passwords frequently.   

Re: [Elecraft] Off-topic, but I need help.

2018-12-29 Thread Bob McGraw K4TAX
Ditto on those points. Yes, Thunderbird is a excellent application. Very easy, very powerful and free. Bob, K4TAX Sent from my iPhone > On Dec 29, 2018, at 10:44 AM, Tim McDonough N9PUZ wrote: > >> On 12/29/2018 6:47 AM, Don Wilhelm wrote: >> Please *don't* switch to a message board! I c

Re: [Elecraft] KX3 Rechargeable Batteries

2018-12-28 Thread Bob McGraw K4TAX
Something I learned from one of our "tech reps" regarding rechargeable batteries and charge cycles.    I have successfully applied his advice for a multitude of and different types of my rechargeable batteries. If you use a battery and then recharge it, that is one charge cycle.   Likewise if

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