Re: [Elecraft] Rx antenna protection

DXE ARAV3-1P - DXE RG 5000HD. I've ordered a DXE ARAVS-1P Receive antenna, and DXE RG 5000HD front end protector from USA, I'm building a CW skimmer project in a small ...ish back yard with close by transmitting antennas etc, my investment should ! Fit the bill nicely.I hope. Ken.. G0ORH

Re: [Elecraft] RX antenna protection

I am aware of the RFI warning however to me there is a huge difference between detecting RFI and protecting the expensive transceiver from RF damage. Apparently the K3S does both. John KK9A Bob McGraw K4TAX wrote: Tue Aug 15 11:59:04 EDT 2017 See page 63 of the manual. Also page 70 under

[Elecraft] Rx antenna protection

Paul, I have used a BOG, a Pixel Loop and a Wellbrook loop receiving antennas. The BOG was ok but signal levels were very low and it needed a preamp. The BOG needs a lot of tweaking and good grounds at both ends. K1FZ is the expert on BOGs and can provide a wealth of information as well as

Re: [Elecraft] RX antenna protection

This is my experience. Making a large-signal preamp is usually a waste of power since it is a mixer that is a limiting factor. I can believe that a device from DX Engineering can be poorly designed. Have NCC-2. Weighs like a tank but fragile like a baby. Ignacy, NO9E On Tue, Aug 15, 2017 at 3:59

Re: [Elecraft] RX antenna protection

I had one once. It was a tremendous TVI generator…. K4TO > On Aug 15, 2017, at 4:07 PM, KENT TRIMBLE wrote: > > The Johnson 250-39 and B 380 T/R switches both had a certain amount of > "suck-out" but they did protect tube receivers. > > I had both (still do) and preferred

Re: [Elecraft] RX antenna protection

The Johnson 250-39 and B 380 T/R switches both had a certain amount of "suck-out" but they did protect tube receivers. I had both (still do) and preferred the Johnson. http://wireless-girl.com/Projects/TRswitches/Johnson/ Note the warning about use with solid-state equipment, however. 73,

Re: [Elecraft] RX antenna protection

I disagree. A good preamp like the DXE preamps can handle large signals and still be linear. That means they can output a lot of power. Do not assume you are safe if there is a preamp unless it is a lousy one! Vic 4X6GP > On 15 Aug 2017, at 18:07, Ignacy wrote: > > If a

Re: [Elecraft] RX antenna protection

et] On Behalf Of Chuck Milam, N9KY > Sent: Tuesday, August 15, 2017 1:16 PM > To: Elecraft Mail List <elecraft@mailman.qth.net> > Subject: Re: [Elecraft] RX antenna protection > > Also, check out the DX Engineering Receiver Guard Electronic RF Limiters: > > > https:

Re: [Elecraft] RX antenna protection

John, Very sound advice. I am using a Alpha Delta T33g50 that I picked up at HRO Denver, Co; The Red Pittaya antenna (Cobwebb) is 15 feet below the TH-7 which is emitting aprox 500W. It has survived for 12 months so far, which has amazed me. Regards

Re: [Elecraft] RX antenna protection

We have been operating this way with full break-in for many years using the KD9SV products. First it was just the "Front End Saver" which removes and grounds the incoming rcv antenna from your radio during transmit. As a "Fail Safe" the device also prevents the Amplifier from working by

Re: [Elecraft] RX antenna protection

lman.qth.net<mailto:elecraft@mailman.qth.net> Subject: Re: [Elecraft] RX antenna protection I haven’t been following this, and just noticed it, so I hope I am in sync with this. Just a note to say that years ago, I had a B Electronic Antenna Switch (I think it was called) that had one or two tube

Re: [Elecraft] RX antenna protection

<mailto:rmcg...@blomand.net> Sent: Tuesday, August 15, 2017 11:00 AM To: elecraft@mailman.qth.net<mailto:elecraft@mailman.qth.net> Subject: Re: [Elecraft] RX antenna protection See page 63 of the manual. Also page 70 under Receive."*HI RFI* warning:" RFI DET - *NOR *enables

Re: [Elecraft] RX antenna protection

See page 63 of the manual. Also page 70 under Receive."*HI RFI* warning:" RFI DET - *NOR *enables detection of high RFI at the antenna in receive mode. (see HI RFI warning. *Troubleshooting*). Set to OFF to disable the warning. 73 Bob, K4TAX K3S s/n 10163 On 8/15/2017 9:50 AM,

Re: [Elecraft] RX antenna protection

If a receive antenna has a preamp, there no need to do any antenna guard since the preamp cannot destroy K3. I used K9AY, K7TJR 3 el array, and a Wellbrook loop close to transmit antennas. None was turned off during transmit. Both have preamps and nothing was damaged despite running a KW. Of

Re: [Elecraft] RX antenna protection

John, The K3S does have protection on the RX ANT input. It is in the form of a COR (carrier operated relay) that will close in the presence of a high RF Field. While that protects the K3S, the relay clacking can be bothersome, so if you do hear that relay clacking, you may want to consider

Re: [Elecraft] RX antenna protection

Great question! I asked the same thing once and never got an answer so to be safe I either short the RX antenna during transmit or if SO2R I use DXE receiver guards. It would be nice if the K3S had a similar built in protector. John KK9A W1PEF wrote Mon Aug 14 21:48:29 EDT 2017 I am considering

Re: [Elecraft] RX antenna protection

day, August 15, 2017 1:16 PM To: Elecraft Mail List <elecraft@mailman.qth.net> Subject: Re: [Elecraft] RX antenna protection Also, check out the DX Engineering Receiver Guard Electronic RF Limiters: https://www.dxengineering.com/search/part-type/hf-receive-antenna-system-dev ices/produc

Re: [Elecraft] RX antenna protection

Also, check out the DX Engineering Receiver Guard Electronic RF Limiters: https://www.dxengineering.com/search/part-type/hf-receive-antenna-system-devices/product-line/dx-engineering-receiver-guard-electronic-rf-limiters?autoview=SKU=Default=Ascending --- Chuck Milam, N9KY n...@arrl.net On

Re: [Elecraft] RX antenna protection

Same situation here: small space and would like to try some low noise receive antennas. I recently bought an Array Solutions AS-RXFEP rf limiter to use on the RX Ant port of my K3. Haven't tried it yet but looks like it will do the job. 73, Drew AF2Z On 08/14/17 21:48, W1PEF wrote: I am

[Elecraft] RX antenna protection

I am considering a Rx antenna but my property is small and concerned about strong signals over powering the receiver. Does the K3S have built-in protection? Does anyone use a loop receive antenna or BOG antenna ... would like some recommendations from actual users of receive antennas. Have the

Re: [Elecraft] RX antenna & carrier-operated relay

Jim, thanks for the info about the VE3DO loop, I'll check OK1RR webpage out. My short beverage runs away from the tower, starting about 5 meters from it and going towards USA (NW). Unfortunately I don't have much more space to relocate the beverage farther away. My idea was to ask adding a

Re: [Elecraft] RX antenna & carrier-operated relay

Didn't I see something about "protectors" built into the K3S antenna connectors? Are they like the transient discharge tubes that protect (somewhat) against lightning? Is there also one on the RX antenna input? Don K2BIO On 03/04/2017 06:05 PM, Jim Brown wrote: Fabio, You've seen my

Re: [Elecraft] RX antenna & carrier-operated relay

Fabio, You've seen my antenna farm -- Beverages run within 20-30 ft of my 160M TX antenna facing NE. Beverages feed a DX Eng preamp before going the sub-RX. I don't do anything special to protect the radio, but it does occasionally protect itself. I also use the Beverages on 80, 40, and 30M,

Re: [Elecraft] RX antenna & carrier-operated relay

Hi Dave, thanks for the suggestion. I tried doing a quick measure using a cross-needle SWR meter today, using the lowest setting. On 40m the power appears to just deflect the needle, well below the 0.5W mark. Probably I could say less than 250mW, maybe 100mW. I usually have an external relay in

Re: [Elecraft] RX antenna & carrier-operated relay

The 2nd Rx port is on a relay, and not a particularly fast or quiet one in my K3. I'd hate to operate QSK that way! I could see a menu option that would activate it with a longer hang time, but you'd probably be better off with an external switch and/or front-end protector. -kb7psg

Re: [Elecraft] RX antenna & carrier-operated relay

Hello Fabio I have two beverages that are somewhat close to my TX antenna. One had about 75 mw on it during TX while beverage #2 had about 1 watt! This is enough power to cause damage to preamps, so I made two power limiters and now the inputs are clipped at about 0 dBm. All it took was

[Elecraft] RX antenna & carrier-operated relay

Hi guys, I was thinking of a possible firmware improvement related to the carrier operated relay. I use my radio on a small lot and recently I added a short beverage antenna for low-bands receiving. My main activity is single-op contesting. Because of the interaction between the tx antennas and

[Elecraft] Rx antenna for K3's 2nd receiver

My K3's second receiver is connected directly to the BNC antenna connector with a TMP M/F jumper cable I made, and is permanently connected to a 6M omni antenna. It's (only) used for listening for 6M openings. 73 Ken - K0PP __ Elecraft

Re: [Elecraft] RX antenna

The preamp is on or off per-band and per-antenna. So for example you could have it on with the rx antenna and off with antenna 1 and on for antenna 2 on a given band. Possibly when you turn the rx antenna on or off you are also changing the state of the preamp, and that is what the ham pod is

Re: [Elecraft] RX antenna

It may be because if you turn the preamp on while the rx ant is on. Then the preamp will turn ON/OFF when you toogle the RX ant ON/OFF. I hope that is clearer than mud. Rich On 3/21/2015 10:53 PM, Ian Westerland wrote: Hi! My K3 arrived last Wednesday and has since been set up and is now

[Elecraft] RX antenna

Hi! My K3 arrived last Wednesday and has since been set up and is now in use. It is a great transceiver I am enjoying getting to kno. I am using a Hampod to provide access via voice output and am wondering about the RX antenna button on the K3 front pannel. When I turn the RX antenna off

[Elecraft] Rx antenna on K3

I've had my K3 since June and everything seems to be working OK. I just recently tried an RX antenna (beverage), but it doesn't work. I've tried several antennas in the RX-in port, but no signal. I've reviewed the manual and CONFIG parameters, but no cigar. I initially hooked it onto the

Re: [Elecraft] Rx antenna on K3

Dick, Have you tried the regular antenna on the RX antenna jack? I am trying to eliminate the possibility that your beverage antenna has significantly lower gain than your transmit antenna (beverages do have lower gain). We need to know whether it is a K3 problem or an antenna problem. The

Re: [Elecraft] RX antenna (K3)

DX Eng makes good stuff, Adriano, and I would think this to be a good vertical active whip. You might want to also check out the active whip from Clifton Labs. It is also a high quality unit with good overload characteristics and ability to automatically turn off during Xmit periods. Available

Re: [Elecraft] RX antenna (K3)

The DXE NCC1 is also a nice unit that gives the ability to adust the phase between two rx antennas. I use one with two of the clifton labs active antennas and also installed two of Jack's new HP filters in the NCC1 (It has provisions for filters but DXE decided not to build the filters). 73 Greg

Re: [Elecraft] RX antenna (K3)

Craig I'm most interested in your system and I wonder if you could describe it further. What size is your loop and do you use a separate phasing unit before injecting the result into the K3 rx input? David G3UNA Another possibility you might want to explore is a K9AY loop array, even if

[Elecraft] RX antenna (K3)

Hello i´m considering a rx antenna for the K3. As i do not have space for big systems like beverage, etc, i´m thinking about this one from DX Eng.: http://www.dxengineering.com/Parts.asp?ID=2190PLID=220SecID=79DeptID =12PartNo=DXE-ARAV3-1PE

[Elecraft] Rx Antenna...

The way I read the manual description and diagrams is:- If you want to use a separate RX antenna *without* the KAT3 and *without* the sub-Rx then you *must* have the KXV3... Please correct me if I am wrong... this is of great interest to me -- Dave G. KK7SS '65 MK III Sprite in Richland, WA

Re: [Elecraft] Rx Antenna...

That's the way I see it. 73, Ken K3IU Dave G. wrote: The way I read the manual description and diagrams is:- If you want to use a separate RX antenna *without* the KAT3 and *without* the sub-Rx then you *must* have the KXV3... Please correct me if I am wrong... this is of great interest to

[Elecraft] Rx Antenna...

KK7SS asked: The way I read the manual description and diagrams is:- If you want to use a separate RX antenna *without* the KAT3 and *without* the sub-Rx then you *must* have the KXV3... Please correct me if I am wrong... this is of great interest to me If you want to use a separate RX