Re: [Elecraft] K3 power amp 2SC2782

Hank, The 2SC2782 is not internally matched and is the only part ever used in the KPA3. The KPA3A uses MOSFETs. 73, Bob, N6CM On Sat, Jan 5, 2019 at 11:04 AM HP wrote: > Anyone know if the Toshiba 2SC2782 transistors used in the K3 power amp > have internal matching (mos cap and wirebonds )

Re: [Elecraft] [KX3] Great QSOs, 21st century

I received my Novice license in 1953 at the age of 11. I had a NC101X receiver that my dad bought for me at Henry Radio on Century Blvd in LA for $60. While waiting for what seemed like decades for my license to arrive, I built a 6AG7 crystal oscillator for my transmitter. I had one crystal at

Re: [Elecraft] KAT500 "Bypass SWR"?

Yes, Bob, N6CM On Thu, Jun 2, 2016 at 6:51 PM, Brian F Wruble wrote: > My KAT500 utility program shows the tuned VSWR, generally a low number, > and it also shows "Bypass SWR". Is that a reading of the feed line SWR > without the tuner in the circuit? > > TNX. 73 de Brian

Re: [Elecraft] Subjecting W2 V/UHF Sensor to more than 200W

out your faults, your anger, your impatience, > your egotism; do this consciously, voluntarily. > -Jean Toomer, poet and novelist (1894-1967) > > On 26 Apr 2016, at 17:52, Robert Friess <rfri...@usa.net> wrote: > > Exceed by how much? > > Bob > > On Tue, Apr

Re: [Elecraft] Subjecting W2 V/UHF Sensor to more than 200W

Exceed by how much? Bob On Tue, Apr 26, 2016 at 4:27 AM, David Ferrington, M0XDF < m0...@alphadene.co.uk> wrote: > Not that I’m planning to do that, but does anyone know it’s max tolerance > over a few seconds if one was to exceed the 200W by mistake? > 73 de David, M0XDF (K3 #174, P3 #108) >

Re: [Elecraft] 10 MHz Reference Oscillator

Where do I find the distribution amplifier? Bob On Sat, Oct 31, 2015 at 12:19 PM, Mel Farrer via Elecraft < elecraft@mailman.qth.net> wrote: > I agree, and when you put the GPS referenced osc against my HP8920 and the > old HP 5346M on X-Y scope input, the circle hardly moves. > Mel, K6KBE > >

Re: [Elecraft] Transistor pads

Hi Merv, Yes, heat sink compound will work fine. 73, Bob, N6CM On Mon, Aug 10, 2015 at 9:31 PM, Merv Schweigert k...@flex.com wrote: I was just updating my oldest K3 to the new Synth, and a couple other mods, one mod required the rear portion of the bottom plate be removed, I notice

Re: [Elecraft] XV144 transverter firmware

Rev 1.6E is the latest firmware. 73, Bob, N6CM On Sat, Jul 4, 2015 at 10:03 PM, Pierre-François (f5bqp_pfm) pfmo...@wanadoo.fr wrote: Hi the Group, What is the latest firmware revision of the processor (PIC 16F872/1 SP) which is located on the front board of the XV144 transverter? The

Re: [Elecraft] ERR XV3

Go to Config, KXV3, tap 9 Exit the menu. 73, Bob, N6CM On Sat, Jun 6, 2015 at 2:26 PM, Jim Sheldon w...@cox.net wrote: Yes there is, but it doesn't work because the K3 (not K3S) firmware is not recognizing the KXV3B module or at least not recognizing some parts of it. Some of the hardware

Re: [Elecraft] KPA500 clicking

What you are hearing is due to magnetostrictive force causing the windings of the inductors in the TR switch to bang against their cores as the TR switch bias is applied. There are no relays. 73 Bob, N6CM, KPA500 design engineer. On Mon, Dec 29, 2014 at 10:23 PM, mcduf...@ag0n.net wrote: RF

Re: [Elecraft] Belt clip for KX3 after you install the 2 or 4 Meter module?

In addition to my 12 and 5 inch Post slide rules, I have my Dad's KE. Bob On Fri, Aug 15, 2014 at 12:57 PM, Fred Jensen k6...@foothill.net wrote: I still have my 12 KE Log-Log Duplex Vector rule, here on the desk, and I use it for a few things for which I can't remember the equations but I

Re: [Elecraft] Belt clip for KX3 after you install the 2 or 4 Meter module?

Of course, some of us had a 12 inch slide rule on the belt and a 5 inch in the shirt pocket. Bob On Thu, Aug 14, 2014 at 5:31 PM, Jim Lowman jmlow...@sbcglobal.net wrote: I assume that you're kidding about both. It would truly be a shame to take a fine piece of radio craftsmanship like the

Re: [Elecraft] Ouch - An Update

Congrats Mike, Bob, N6CM On Mon, Jun 30, 2014 at 8:55 PM, Jim Brown j...@audiosystemsgroup.com wrote: On 6/30/2014 7:56 PM, Matt VK2RQ wrote: I'd suggest to replace the toroid core, as the high temperatures to which it was subjected may have altered the characteristics of the material.

Re: [Elecraft] Ouch

Hi Mike, Probably just smoked T4, the voltage sampling transformer in the SWR bridge. That's probably a simple repair. 73, Bob, N6CM On Sun, Jun 29, 2014 at 8:23 PM, Mike Lewis mlewi...@gmail.com wrote: So about 20 minutes prior to starting another successful Field Day with my trusty K3 I

Re: [Elecraft] KX3 supplemental heat sink offering

Hi Fred, Please send pictures and prices. 73, Bob, N6CM On Fri, Mar 28, 2014 at 10:24 PM, fredem fsme...@telus.net wrote: In response to KX3 owners who wish to utilize high duty digital modes and who find the factory heat sink a little light, for those KX3 owners who are long winded and

Re: [Elecraft] KX3 and KPA-500

Chris, You don't have to go to STBY and send a dit for a band change to avoid hot switching. When the need to bandswitch is detected, the KPA500 automatically goes to BYPASS, performs the band change, and then switches itself back in line all within a small fraction of a second. Bob, N6CM On

Re: [Elecraft] Elecraft reflector

We are all getting ready to watch Stanford beat Cal Bob, N6CM On Sat, Nov 23, 2013 at 12:44 PM, Bill W2BLC w2...@nycap.rr.com wrote: Something gone wrong with the reflector? I am not seeing much activity on it. Bill W2BLC __

Re: [Elecraft] Elecraft reflector

I'd like that too. Bob On Sat, Nov 23, 2013 at 1:01 PM, Kurt Cramer w7...@msn.com wrote: No, Arizona beat Oregon! Kurt, W7QHD From: rfri...@usa.net Date: Sat, 23 Nov 2013 12:56:00 -0800 To: w2...@nycap.rr.com CC: elecraft@mailman.qth.net Subject: Re: [Elecraft] Elecraft reflector

Re: [Elecraft] OT: Hallicrafters SX-62 and external speaker available

NC101X, love that receiver. I still have one. It was my first receiver back in 1954. My dad bought it for me at Henry Radio in LA. Bob On Tue, Sep 10, 2013 at 6:54 PM, Vic K2VCO k2vco@gmail.com wrote: I thought I would offer to trade you an HRO-5 and NC-101X for it, but I realized

Re: [Elecraft] OT: Hallicrafters SX-62 and external speaker available

It was $60. Quite a lot back in the day. Bob On Tue, Sep 10, 2013 at 6:57 PM, Robert Friess rfri...@usa.net wrote: NC101X, love that receiver. I still have one. It was my first receiver back in 1954. My dad bought it for me at Henry Radio in LA. Bob On Tue, Sep 10, 2013 at 6:54 PM

Re: [Elecraft] KPA500 fault at H44KW (no pwr high SWR)

Check the wires between the ANTENNA connector and the low pass filter board. Bob, N6CM On Wed, Feb 20, 2013 at 8:08 AM, David Shoaf david.m.sh...@gmail.comwrote: Neil, Please contact Elecraft Customer Support at K3support 'at' elecraft.com. We can help out the DXpedition assessment

Re: [Elecraft] KPA500 / KAT 500

Hi Tim, That's what I do too. Keeps the heavy cables from pulling the KAT500 off the table. Bob, N6CM On Wed, Jan 30, 2013 at 2:05 PM, Tim Hague m0...@yahoo.co.uk wrote: Is there any reasons why I shouldn't sit the KPA500 on top of the KAT 500 ATU? Best regards, Tim Hague Skype m0afj.Tim

Re: [Elecraft] [XV432} LO Instability Problem

Hello Ian, Comments below On Fri, Jan 25, 2013 at 8:48 AM, Ian Greenshields ian.greenshie...@gmail.com wrote: Thanks for all the help and comments received so far, on and off reflector - I have to say the responsiveness and quality of help on this reflector is second to none! To

Re: [Elecraft] [KAT500] more antennas

Either T130-6 or T130-2 should do nicely. 73, Bob, N6CM On Thu, Jan 17, 2013 at 2:22 PM, ab2tc ab...@arrl.net wrote: Hi all, I apologize if this is a little bit OT, but it isn't really. My remote KAT500 is currently maxed out with a G5RV and two resonant dipoles for 10m and 15m (all

Re: [Elecraft] How do I print a spectrogram file?

The Snipping Tool that is built into Win7 works well for me. Bob, N6CM On Sun, Jan 13, 2013 at 8:50 PM, David Gilbert xda...@cis-broadband.comwrote: FastStone Capture might be an interesting possibility for you as well. It's not free ($20 for a lifetime license) but it will also record

Re: [Elecraft] N-gen question

Hi Matt, The 35dB excess noise is in reference to a 50 ohm resistor at room temperature. The power is a function of bandwidth. If the bandwidth is 500 Hz, that is -174dBm. Here is the MAR1 data sheet http://www.minicircuits.com/pdfs/MAR-1+.pdf 73 and Happy New Year, Bob, N6CM On Mon,

Re: [Elecraft] N-gen question

oops, Alan is right. Brain not engaged. Bob On Mon, Dec 31, 2012 at 3:41 PM, Alan Bloom n...@sonic.net wrote: Matt, -174 dBm is the noise of a resistor at room temperature in a 1 Hz bandwidth. In a 500 Hz bandwidth (which seems to be the standard for receiver measurements) you get 10 *

Re: [Elecraft] W2 Wattmeter accuracy at low power

The W2 cannot measure power in the 1-10mw range. The sensors are calibrated at 144 and 460 MHz. They will certainly work in the 100-118MHz range but the accuracy is unknown. Bob, N6CM On Wed, Dec 26, 2012 at 1:47 PM, jeffrey741 jfedi...@alum.rpi.edu wrote: I am looking for information

Re: [Elecraft] KPA500 output on 6 meters

Hi Pete, It sounds like a hardware problem in the low pass filter module. Contact Elecraft customer support. 73, Bob, N6CM On Tue, Dec 11, 2012 at 10:11 AM, Pete Lascell plasc...@verizon.net wrote: Operating my K3 on 6 meters with the KPA500 ( S/N 1009 ) is new ground for me. The amp has

Re: [Elecraft] KAT500/F Missing thermal pad on R5

It is R6. Bob, N6CM On Mon, Dec 3, 2012 at 5:57 PM, Phil Hystad phys...@mac.com wrote: Is that a typo or does your factory built KAT500 label that resistor as R5? In my kit KAT500 it is R6. peh On Dec 3, 2012, at 2:57 PM, Jim Sheldon w...@cox.net wrote: My factory built KAT500 is

Re: [Elecraft] W2 directional coupler N-connector

The sensors can be ordered with N connectors from Elecraft. Bob, N6CM On Tue, Aug 7, 2012 at 9:45 AM, Ken G Kopp kengk...@gmail.com wrote: Yes Paul, the connectors on the sending units are easily changed. All mine have been changed using kits from Morse Express that come with nicely-done

Re: [Elecraft] OT - kits for young kids?

Never underestimate a curious 7 year old. One of my grandsons built a soldering kit for a FM radio at about that age. He had a fair amount of supervision but learned really quickly. Bob, N6CM On Mon, Nov 21, 2011 at 3:43 PM, Bill K9YEQ k9...@live.com wrote: Ok you are asking for it... in

Re: [Elecraft] Harmonics from K3

Hello Poul-Erik, If your K3 is putting out 100 watts, it is very unlikely that it is generating the harmonics that you are measuring, especially in the case of the even harmonics. Your measured results may be due to some non-linear element in the near field such as a corroded or loose connection

Re: [Elecraft] KPA500 - Final Transistors

VRF2933. 73, Bob, N6CM On Wed, Oct 19, 2011 at 9:28 AM, Robert Dorchuck W6VY w...@yahoo.comwrote: Can anyone tell me what transistors are used in the PA on the KPA500. I can't seem to find it in the specifications and I still do not see a schematic available. The link to a schematic listed

Re: [Elecraft] W2problems

Alan, Check that you have the coupler connected in the right direction when you have it on the KPA500. From your description, it sounds like it is connected backwards. 73, Bob, N6CM On Wed, Oct 19, 2011 at 7:56 PM, Alan Grant asgr...@aapt.net.au wrote: I feel that I have a problem with my

Re: [Elecraft] KPA 500 QUERY

Hi Bob, There is an insulating, heat conductive, pad on the LM317 fan control, the device closest to the rear panel. The other two do not dissipate enough power to require heatsink compound. However, if it makes you more comfortable, it will do no harm. 73, Bob, N6CM On Wed, Oct 12, 2011 at

Re: [Elecraft] KPA500 hum

Hi Phil, Wayne was referring to the highest supply voltage internal to the amplifier which increases in steps when moving from the yellow to the red, to the green tap. It is a bit confusing because the highest voltage tap would be used with the lowest AC mains voltage to maintain the operating

Re: [Elecraft] KPA500

Yep, some of the old stuff was the subject of dreams of the teenage ham. I will never give up my Collins 75A4. Bob On Mon, Sep 5, 2011 at 6:10 PM, Ron D'Eau Claire r...@cobi.biz wrote: About 10 years ago I collected all the parts for a 100 watt tube amp running a pair of 807's. I was

Re: [Elecraft] [KPA500] AUX Button

Hi Al, The AUX button has no function at this time. It is reserved for possible future features. 73, Bob, N6CM On Sat, Aug 13, 2011 at 4:02 PM, Al Lorona alor...@sbcglobal.net wrote: What is the AUX button on the KPA500 for? Al W6LX

Re: [Elecraft] Looking for miniature 14-V power supply for travel use

Jameco has a lot of these. Not sure how quiet, but they are cheap enough that you could buy 2 or 3 and pick the best. Bob, N6CM On Mon, Jul 4, 2011 at 2:23 PM, Wayne Burdick n...@elecraft.com wrote: I'm going to take a KX3 with me on vacation this summer, and I like to travel light. I'll

Re: [Elecraft] KPA500 driven by KX3 ... what output to be expected ?

Hello Enno, The KPA500 will put out between 150 and 200 watts with 10 watts of drive. Bob, N6CM On Mon, Jun 20, 2011 at 1:59 AM, Enno Korma, PF5X c...@dx.nl wrote: Hi all, I believe once the KX3 is shipping it would be interesting to use it with the KPA500. Given the rel. small size of

Re: [Elecraft] Amp specs

The KPA500 is rated for 500W PEP or CW. Bob, N6CM On Thu, May 26, 2011 at 4:50 AM, John Harper j...@ae5x.com wrote: In looking at several HF amps, I notice that PEP and CW are usually of different levels for a given amp. For example, THP's HL-1.2 is rated at 750w PEP, 600w CW. Granted, a

Re: [Elecraft] KPA500

The KPA500 uses a push-pull pair of VRF2933s manufactured by Microsemi Corp. 73, Bob, N6CM On Thu, May 26, 2011 at 7:08 PM, R. Kevin Stover rksto...@mchsi.com wrote: Hello all. Just wondering what the KPA500 uses for finals. I have both manuals but don't see it mentioned in either one, and

Re: [Elecraft] KX3 Fixed Ops

The KXPA100 is a separate stand-alone unit that does not mount on the KX3. 73, Bob, N6CM On Sun, May 22, 2011 at 9:01 AM, Eugene Balinski euge...@nni.com wrote: There has been a flurry of questions about the KX3. I do not remember seeing this one. Does anyone know if the KX3 will mount to

Re: [Elecraft] KX3 - New 100 watt amp

The new KXPA100 will work with any radio that provides 5 watts of RF and a Key out line. It does not require AuxBuss. Bob, N6CM On Thu, May 19, 2011 at 5:13 PM, Guy Olinger K2AV olin...@bellsouth.netwrote: On Thu, May 19, 2011 at 7:19 PM, stan levandowski sjl...@optonline.net wrote: Plus,

Re: [Elecraft] KX3 - New 100 watt amp

, May 19, 2011 at 8:32 PM, Robert Friess wrote: The new KXPA100 will work with any radio that provides 5 watts of RF and a Key out line. It does not require AuxBuss. Bob, N6CM __ Elecraft mailing list Home: http://mailman.qth.net

Re: [Elecraft] KX3 - New 100 watt amp

Elecraft rigs, it would be the greatest! Sounds like that might be at least 75% true. Thanks, stan. On Thu, May 19, 2011 at 9:14 PM, Robert Friess wrote: Yes, the new amplifier is the KXPA100. Bob On Thu, May 19, 2011 at 6:10 PM, stan levandowski *sjl...@optonline.net* wrote: Bob

Re: [Elecraft] KX3 - New 100 watt amp

, NAQCC #5352, QRP-ARCI #14326 On May 19, 2011, at 9:14 PM, Robert Friess wrote: Yes, the new amplifier is the KXPA100. Bob On Thu, May 19, 2011 at 6:10 PM, stan levandowski sjl...@optonline.net wrote: Bob, is KXPA100 the product name of the new 100 watt amp? Or, did you

Re: [Elecraft] KPA500

Hi Knut, That is correct. When in STBY, the KPA500 input signal is routed directly to the KPA500 bypassing the amplifier. This is unchanged by the state of the Key Line. Bob, N6CM On Wed, May 18, 2011 at 2:35 PM, ab2tc ab...@arrl.net wrote: Hi, I am starting to drool about the KPA500. Let

Re: [Elecraft] kpa kit manual

The KPA500 kit manual is in final editing and will be posted shortly after Dayton. Bob, N6CM On Wed, May 18, 2011 at 10:01 PM, tony rowland biggsbigb...@yahoo.comwrote: when will the kpa 500 kit manual post on the download list? s/tony rowland

Re: [Elecraft] The Good Kind of IMD for CW buffs

As a kid, I often visited a station in S. California, in Hawthorne, I think. Long time ago. I don't remember the call sign. Maybe KFS. Bob On Tue, Apr 19, 2011 at 4:32 PM, Ken - K0PP kengk...@gmail.com wrote: I used to hang out at Tampa's WPD ... boy, that was a long time ago! Helped ole

Re: [Elecraft] XG3 device...

All XG3 amplitude references refer to the amplitude of the fundamental frequency component only. Bob, N6CM On Thu, Apr 14, 2011 at 9:09 AM, Tony Estep estept...@gmail.com wrote: On Thu, Apr 14, 2011 at 10:32 AM, Ron D'Eau Claire r...@cobi.biz wrote: A square wave's frequency Ron,

Re: [Elecraft] Does the KPA500 have a bail to match the K3 P3?

Yes it does, Bob, N6CM On Thu, Apr 14, 2011 at 8:49 PM, David Inger ingerassocia...@verizon.netwrote: Perhaps one of the beta testers or Eric/Wayne would be kind enough to answer the question in the subject line. I do not see a reference to a bail in the draft Owner's Manual. 73 de

Re: [Elecraft] KPA500 kit

The KPA500 kit is a no-solder kit similar to the K3. Bob, N6CM On Sun, Apr 10, 2011 at 2:43 PM, Mike Fatchett w...@w0mu.com wrote: I want to say that I read something that the kit would be like the K3 with boards to install. On 4/10/11 2:55 PM, Jeff Kinzli N6GQ wrote: I haven't seen it

Re: [Elecraft] KPA500 RF Input

The gain of the KPA500 is about 13 dB or a power gain of 20. So with 10 watts in, the output will be about 200 watts. Bob, N6CM On Thu, Apr 7, 2011 at 9:16 PM, Sid Leben s...@leben.com wrote: What would the minimum input rf power be and the resultant rf out ? I am thinking of using it with

Re: [Elecraft] K3 Antenna static bleed

Also, spark gaps. Bob On Thu, Feb 24, 2011 at 7:50 PM, Dick Dievendorff die...@comcast.netwrote: I see them on the KAT3 schematic, at the top left. There's a 560K resistor to ground as well as a carrier operated relay (COR) to deal with high input for each of the two antenna connectors.

Re: [Elecraft] kpa-500

The KPA500 is compatible with virtually any transceiver including, of course, the K2. Bob, N6CM On Mon, Feb 21, 2011 at 5:54 PM, Leroy Marion lmar...@mt.net wrote: Is the KPA 500 going to be K2 compatible ? Roy AB7CE -Original

Re: [Elecraft] KPA-500 from Orlando

Not including projections, the KPA500 is exactly the same size as the K3. Bob, N6CM On Mon, Feb 14, 2011 at 7:41 PM, Amateur Radio Operator N5GE n...@n5ge.comwrote: I wonder what the dimensions of the KPA500 are. It doesn't look much larger than the K3. 73, Tom Childers Radio Amateur

Re: [Elecraft] High SWR into Dummy load

Wrong ANT port? Bob On Sun, Feb 13, 2011 at 11:51 AM, dbellw...@aol.com wrote: Hi, I just finished putting together my 2nd K3, downloading all the firmware, etc., and find that while everything seems to work fine, my SWR is astronomical -- like 15 to 1 after the antenna tuner has looked

Re: [Elecraft] KPA-500 Features and Pricing

Andy, The KPA500 power supply provides regulated outputs of -12, +12, and +5 volts for control and switching and unregulated 60V for the power devices. Bob, N6CM On Thu, Sep 9, 2010 at 1:28 PM, Andy Wood vk...@woodtech.net.au wrote: Regarding the KPA500 internal power supply - is it actively

Re: [Elecraft] KPA-500 Features and Pricing

Andy, It depends on the definition of quite a bit. The power supply is designed for a minimum line frequency of 50Hz. Higher line frequency will cause no harm. Low voltage input of 15% below nominal or so will start to reduce power output. High voltage input above nominal of about 15% will

Re: [Elecraft] How much power does it take to drive ...

The KPA500 requires 30 to 40 watts for full output. With 10 watts of drive the output will be around 200 watts or a little less. Bob, N6CM On Wed, Sep 8, 2010 at 8:15 PM, Phil Townsend phi...@mac.com wrote: The KPA 500? Will I need to upgrade to the 100 watt machine or will the ten watt k3

Re: [Elecraft] XV432 Alignment Problems - Help!

Mark, Even though TP5 is zero, do you measure power output power with an external meter? What do you see at TP6 (marked TP5 on the schematic. TP6 is at the input of the gain block) Bob On Sun, Sep 5, 2010 at 5:48 PM, Don Wilhelm w3...@embarqmail.com wrote: Mark, I am out of help on that

Re: [Elecraft] Amplifier

If the SPE does that, which is 17dB gain, then it does not conform to FCC rules that limit gain to 15dB. Bob, N6CM On Tue, Aug 10, 2010 at 12:37 PM, W4GRJ w4...@satterfield.org wrote: Depends on the Amplifier, I have a SPE Expert 1K-FA.10watts drive = 500 watts out Jack W4GRJ

Re: [Elecraft] W2 Wattmeter question

Hi Dale, I designed the couplers for the W2 and have not tested the VHF/UHF coupler at 1.2GHz. However, I would expect very poor performance at that frequency. It is far outside the design range. Bob, N6CM On Mon, May 17, 2010 at 3:38 AM, dalej dal...@mac.com wrote: Hi, I don't post here

Re: [Elecraft] the ultimate rig..

If he were to peel one turn off the output transformer, from 4 turns to 3, it should be just about right. Bob On Tue, Oct 13, 2009 at 11:33 AM, Don Wilhelm w3...@embarqmail.com wrote: Bill, How about just turning the power control on the K2 down to 40 watts and measure the key-down current

Re: [Elecraft] K3 XV-144 Power Output

Hi Eric, You have got it figured out. I would set the K3 to a little less than 1mw and then adjust R22 on the transverter for your desired output. That should give you plenty of range on the K3 power control for fine adjustment. 73, Bob, N6CM On Sun, Oct 4, 2009 at 6:55 PM, eric norris

Re: [Elecraft] W2 Sensors

Hello Phil, The sensors measure 2.25 x 2.25 x 5.00 inches not including the RF connectors. 73, Bob, N6CM On Mon, Aug 10, 2009 at 4:39 PM, Phillip Buckholdtk8mb...@wadsnet.com wrote: Anyone know the physical size of the W-2 watt meter sensors?     Tn Phil

Re: [Elecraft] K3: machined concentric knobs from Mouser

Me too, Bob, N6CM On Thu, Jul 30, 2009 at 5:12 PM, Alan Bloomn...@cds1.net wrote: On Thu, 2009-07-30 at 08:52 -0700, Ed Muns wrote: I had a foam shop fabricate a custom die set for punching out foam protectors for both the front and rear panels of the K3.  The closed-cell foam is then glued

Re: [Elecraft] K144XV followed by KPA3?

Hi David, The K144XV is compatible with both the low and high power versions of the K3. Previously manufactured units may require updates in certain sheet metal so be sure and tell the factory the version of the K3 that you have or that you upgrade to. 73, Bob, N6CM On Sun, Jul 5, 2009 at 1:09

Re: [Elecraft] K3 - SWR Indication

Hello Geoff, Which bands were you making the comparison on? Bob, N6CM On Mon, May 4, 2009 at 9:48 AM, Geoffrey Downs geoff...@downs.globalnet.co.uk wrote: - Original Message - From: Steve Ellington n...@carolina.rr.com Geoff Try putting a 50 ohm dummy load in line and see if the

Re: [Elecraft] [K3] K3 3.04 Power Output After Tune

There are two menu entrys that effect power in addition to the front panel PWR control. There may be interaction between these in certain combinations of settings or BAND and MODE. Wayne has limited internet access this weekend and has asked me to request information from those who are

Re: [Elecraft] K3 Shuts Off On High Power-HELP!

The radio is drawing too much current. What is the key down supply voltage at the radio? Bob On Wed, Feb 25, 2009 at 6:53 PM, -.-. --.-N3TU -.-. --.- connectme...@hotmail.com wrote: I just shut the radio and power supply off and turned it back on. Now on all the bands it is drawing around

Re: [Elecraft] full 70cm band coverage possibilities?

Changing the IF of the XV432 is not difficult from a design standpoint, but requires careful testing with test equipment not found in most hamshacks. A new crystal would be needed in the Local Oscillator and there may be possible changes in a couple of the LO filter components. Next the IF

Re: [Elecraft] XG2 Test Oscillator Part Question

Hi Jon, The ZXRE1004D is an equivalent part. 73, Bob, N6CM On Fri, Feb 13, 2009 at 7:20 PM, Jon Perelstein jpere...@yahoo.com wrote: The instructions/user manual calls for Ref Diode U1 as a ZXRE125DR. The part that I received is a ZXRE1004D. Can anyone confirm that the 1004D replaces the

Re: [Elecraft] Need Help with XG1

Hi Pete, You are working much too hard. I designed the XG1 for Elecraft and if you send it to me, I'll repair it for you. 73, Bob, N6CM On Fri, Jan 30, 2009 at 6:34 AM, Pete Smith pete.n...@gmail.com wrote: Regrettably (hi), the emitter resistor is fine - very close to nominal. wish I had a

Re: [Elecraft] TX IMD

The RD06HHF1 used in the Low Power Amplifier in the K3 is NOT rated to only 30 MHz. It does carry a specification for 6 watts power output and 16dB gain at 30 MHz, perhaps for services at 27 MHz, but further down the data sheet are S parameters all the way to 1000 MHz indicating a much wider

Re: [Elecraft] K3 K3PR6 AMPS IN-LINE

On Tue, Nov 25, 2008 at 7:42 AM, wayne burdick [EMAIL PROTECTED] wrote: Could you post something sane to the reflector? W On Nov 25, 2008, at 1:55 AM, Robert Friess wrote: Oh my, Bob On Tue, Nov 25, 2008 at 1:13 AM, K2ZLS [EMAIL PROTECTED] wrote: For those of you who may want more

Re: [Elecraft] xv432

Hi Ron, Have you applied the errata adding a cap and inductor to the RF module? 73, Bob 2008/11/23 Johnny Siu [EMAIL PROTECTED]: Hi Ron, Please keep the group informed of the latest development. It is interested to notice that there is NOT even one single product review of XV432 in

Re: [Elecraft] PR6 6-Meter Pre-amp Manual error.

I thought that the correct pin was 11. Bob On Thu, Oct 23, 2008 at 10:17 AM, Ron D'Eau Claire [EMAIL PROTECTED] wrote: A-yup! The correct pin is 6. A corrected manual will be on the web site soon. The PR6 comes with a pre-assembled cable to connect it to the power and ACC output on the K3.

Re: [Elecraft] xv432

Ron, did you apply the changes in the Assembly manual errata? Bob, N6CM On Tue, Oct 21, 2008 at 6:34 PM, ron [EMAIL PROTECTED] wrote: it works on dummy load. on ant when you key it it goes to full power doesnt un key tiil you shut it off and the red led stays lit till you turn turn it back

[Elecraft] test

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[Elecraft] test

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Re: [Elecraft] Question on K3 Amp

Those are feedback resistors and dissipate a few watts of power. They need to up in the air to allow the power to dissipate without burning the board. 73, Bob, N6CM On Nov 21, 2007 6:46 AM, Lee Buller [EMAIL PROTECTED] wrote: I was looking at all the neat pictures out there of K3 assembly and

[Elecraft] K3 in SS

I haven't participated in the SS for several years, but today I got on for a little while with my K3. What a fantastic radio. Bob, N6CM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber

Re: [Elecraft] K3 S/N 00011

I second Ed's comments. Same problem here. Bob Sent from my iPhone On Oct 9, 2007, at 1:02 PM, Ed Muns [EMAIL PROTECTED] wrote: I've been having power on problems with my K3 since picking it up last Thursday in Aptos. Initially, the problem was that it would not power up immediately upon

Re: [Elecraft] Re: FCC rules part 18 [CF bulbs vs. LED]

I've been looking at LED bulbs also. I hate changing lightbulbs for reasons I don't fully understand and the long life is a real attraction. The problem today is not so much the cost. The initial cost is high, but over the life of the bulb, they actually cost less than incandescent bulbs not

Re: [Elecraft] N-Gen Output

The N-gen produces noise power that is approximately 35 dB greater than that produced by a 50 ohm resistor. At room temperature a 50 ohm resistor produces a noise power of -174dBm per Hertz of bandwidth. So in a typical CW bandwidth of 500 Hz, the N-gen noise power output is approximately

Re: [Elecraft] Transverters

Hi Kevin, I designed the XV transverters for Elecraft and will attempt to answer your question. Receiver design always requires some compromise between sensitivity and dynamic range. To maximize sensitivity, lossy elements, like filters, are moved farther away from the antenna to minimize

Re: [Elecraft] CP1 Power Handling

Hi Michael, I designed the CP1 for Elecraft and in the process I performed many tests to evaluate the power handling capabilities. The power is limited by heating of the core and that is primarily a function of flux density and time. The published specification allows the rated power to be

Re: [Elecraft] Elecraft CP1 Directional Coupler

The CP1 will be announced in a few days. Good catch! 73, Bob N6CM - Original Message - From: Matt Osborn [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Friday, September 02, 2005 8:57 PM Subject: [Elecraft] Elecraft CP1 Directional Coupler I was just reading the manual for

Re: [Elecraft] DL1 20W Dummy Load

The correct formula which accounts for both the center tap detector and the diode drop appears in the DL1 manual. 73, Bob, N6CM - Original Message - From: Bruce Bowman [EMAIL PROTECTED] To: Elecraft Mail List elecraft@mailman.qth.net Sent: Saturday, May 14, 2005 1:02 AM Subject:

Re: [Elecraft] DL1 20W Dummy Load

Not quite, V^2/25 only accounts for the power in the bottom half of the dummy load. The top half dissipates an equal amount. The formula in the manual accounts for all of this. 73, Bob, N6CM - Original Message - From: W3FPR - Don Wilhelm [EMAIL PROTECTED] To: Bruce Bowman [EMAIL

Re: [Elecraft] XV-50 LNA problems

Hi Greg, Because of the high power and close proximity of the antennas there is probably considerable out of band power being applied to the LNA input. It is difficult to suggest what is needed to alleviate the problem. Do you have some means of measuring the power at the XV50 input when

Re: [Elecraft] XV-50 LNA problems

Greg, Once we know what we are dealing with then we can work out a solution. It could be as simple as an external lowpass filter. That would be nice because the loss would be very low. Bob - Original Message - From: Gregory P. Daly [EMAIL PROTECTED] To: Robert Friess [EMAIL

Re: [Elecraft] XV144 Question

Hi Glenn, I designed the XV144 for Elecraft and I am very interested in your observation. I just had a look at a XV144 here and can not duplicate your finding here. I also looked with a spectrum analyzer and I don't see anything unusual. What you are describing sounds like the preamp could

[Elecraft] KPA100 TR Switch isolation problem

I modeled the switch and have identified the source of the problem. There is a resonance formed between the junction capacity of D12, D14 and the 100uH inductor RFC3. When you add the 12pF cap or a scope probe, all you do is move it around a little. The easiest way to kill this problem

Re: [Elecraft] N-GEN noise generator question

Hi Bob, It makes no difference. The device is symmetrical when rotated. The two leads that become reversed are both ground. 73, Bob, N6CM - Original Message - From: [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Friday, November 26, 2004 8:22 AM Subject: [Elecraft] N-GEN

Re: [Elecraft] Testing BL1 mini module

Hi Chuck, I designed the BL1 for Elecraft and I am curious as to where you got the testing procedure that you describe. I don't find it on the posted manual and it is certainly not what I wrote. That said, the behavior that you observe is exactly what I would expect the BL1 to do.

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