开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
Re: FT 817 repaired
hi Ken after replacing every board in my old FT-817 by brand new ft-818 boards (see in this group) I could set current to the FINAL UNIT as mentioned. BUT no power out at all. Carrier is ok...
By Raimund Reh · #115607 ·
Re: Power output instable
Gavin, thanks for posting this on your experience with the battery pack issue and destruction of the finals, I have never used a battery pack in my 2001 ft817 and it still has the original finals
By VE1RNM · #115606 ·
Re: MRW-HF100 antenna set
Per the OP (!) the MRW-HF100s are base loaded whips not dissimilar to the majority of garden variety CB radio whip (and I have to slot Elecraft's spendy examples in the same category.) In resonating
By Steve · #115605 ·
Re: Power output instable
A lot thanks, Al. It solved for me: I switched a dozen of times between 6m (rear antenna) and 2m (front antenna) and it solved. I hope forever, but I'm not confident; however I know what I have to
By Pietro Molina · #115604 ·
Re: MRW-HF100 antenna set
Yes, though if you are in a very wet location one earth spike might do. Only radials that are in air, above the ground, can be resonant.
By Mike EI9FEB · #115603 ·
Re: MRW-HF100 antenna set
Assuming mast or skyscraper grade lightning conductor. Most of us don't have that, so one or several earths is moot.
By Mike EI9FEB · #115602 ·
Re: MRW-HF100 antenna set
Antenna ground or counterpoise isn't the same than house ground/earth neither serves the same purpose. A counterpoise (grounded or not) is used to avoid returning RF towards the rig via balancing
By Luis Miguel Casta?eda · #115601 ·
Re: MRW-HF100 antenna set
I have to jump in here...The US is single phase power to the house.? The transformer that makes the transition from high voltage to 220 volts is only connected to one phase if three phase power is
By Al WB9UVJ · #115600 ·
Re: MRW-HF100 antenna set
I was chief engineer at a TV station in USA. Everything was bonded to a single point ground. Inside the building we used 6" flat copper strap. We took many strikes to the 2000' tower, but never had an
By Glenn Little · #115599 ·
Re: MRW-HF100 antenna set
Here's what I have come to know about lightning. The trick with lightning is less about ground and more about making sure that the lightning's energy is routed past (not through) you and
By Greg D · #115598 ·
Re: MRW-HF100 antenna set
A single "ground" makes little or no difference. You need all aerials and power cables, Cable TV, phone cables disconnected. A strike even 100m from the utility cables (even buried electricity, phone,
By Mike EI9FEB · #115597 ·
Re: MRW-HF100 antenna set
Glenn, Quite simple, disconnect your radio and other equipment completely during thunderstorms. I learned my lesson many years ago when I got hit by lightning which took out my TS-430s, computer,
By Dave Burroughs · #115596 ·
Re: MRW-HF100 antenna set
How do you prevent damage from a lightning event if everything is not referenced to one ground (earthing point)? The potential difference between the two, or more, earth points can be very
By Glenn Little · #115595 ·
Re: MRW-HF100 antenna set
In UK the "house" ground is usually connected "earth" and connected to neutral at the substation (transformer for the locality). In Ireland there is supposed to be a 1.5m approx galvanised earth spike
By Mike EI9FEB · #115594 ·
Re: MRW-HF100 antenna set
Yes 1/4 wave of the frequency, if of the ground, Otherwise if on the ground do about 10 or more, 3m wires, Dave 2E0DMB [email protected]> wrote:
By davebb123456 · #115593 ·
MRW-HF100 antenna set
Not FT817 directly, but I intend to use the kit with it. The instructions say that best performance is had with a ground or a counterpoise. Just for fun, I tried the house ground and that's extremely
By John G0GCD · #115592 ·
BENCHER CW Keyer
Want to sell? MY Bencher IAMBIC? cw keyer model BY 1. Has plastic dust cover on black? heavy base with keying cord. Pictures on request. Price $100 + SHIPPING OR PICK UP NEAR Lexington SC CALL
By nd4z · #115591 ·
MFJ 12 volt 40 amp power supply for sale
MFJ model 4245 MV. Has? a variable DC adjust knob, 40 amp lighter? socket Light weight switching power supply. Price $85.00 Pictures sent on request. Please call 803.816.2537 or e mail
By nd4z · #115590 ·
Kenwood HF TS 440 SAT radio ror sale
Wanting to sell my Kenwood TS 440 S AT HF Radio transceiver. 10 to 160 Meters, Has the auto tuner. Works great, has hand mic, and power cord.? Pick near Lexington .Lake Murray area. Call Richard ND4Z
Re: FT-817 - after replacing MAIN UNIT Board display blinks on bands up 160m
Excellent news, well done, life in the old rig yet. Andy
By M0RON · #115588 ·