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Re: Dimensions of the box the FDM Duo is shipped in
David <david.g8iic@...>
As Thomas said his was, my FDM-DUO was couriered to me in a box within a box. That was in country, not internationally, about 4 years ago.
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INNER BOX dimensions (an ELAD box) - 380X240X95mm. David G8IIC
On 7 Nov 2019, at 08:52, Thomas McQuiggan <m7mcqio83ro@...> wrote:
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Re: FDM DUO INCREDIBLY NOISY!!!
#fdm-duo
Klaus Brosche, DK3QN <dk3qn@...>
Winter Hill Transmitter: see here:
OMG! Plenty of 2-digit Kilo-Watts of
RF! And just 1 MILE AWAY!
Klaus, DK3QN
Am 07.11.2019 um 09:57 schrieb Thomas
McQuiggan:
Yes, I live 1 mile away from WINTER HILL transmitter, but it causes me no problems on any other radio.
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Re: FDM DUO INCREDIBLY NOISY!!!
#fdm-duo
Klaus Brosche, DK3QN <dk3qn@...>
As you might know, FDM-DUO can receive
VHF frequencies by means of undersampling.
So as advised already: switch in that
RX LPF in Menu #2, if it's not already activated.
Any changes in noise level?
Klaus, DK3QN
Am 07.11.2019 um 09:57 schrieb Thomas
McQuiggan:
Yes, I live 1 mile away from WINTER HILL transmitter, but it causes me no problems on any other radio.
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Re: FDM DUO INCREDIBLY NOISY!!!
#fdm-duo
Neil Smith G4DBN
Hi Tom, I live 50km from Emley Moor, and on some bands, the digital TV mixes with cellphone signals from 3km away to make wideband hash which I can only remove by adding very sharp filters. OK, not on HF, but on there I can't hear much because of VDSL. Does enabling and disabling the 50MHz low pass filter make any difference? I had strong medium wave signals nearby, so I fitted an auto-switch filter to my DUO on HF and that removed the crud. I was seeing a lot of that PK indicator though. Connecting a DUO to a wideband antenna in a high-RF environment is never a great idea, but if the 50MHz LPF makes no difference and the PK indicator is not showing, and if adding more attenuation drops the signal the same amount as the noise, then you are not suffering from overload. Compare a VERY weak signal on the other radios and the DUO and see if the DUO can hear as well. You need a signal that is right down at the limit of audibility, ideally a simple tone or CW. I just hook up my signal generator and put a -130dBm pulsed signal into the antenna as a comparison, then drop the level until I can't hear the pulsing. It is a bit of a pointless test really, as band noise is way higher than the noise floor of the DUO, but it is a good comparison. I could be cheeky and say the other radios are deaf of course, that woudl make them quiet! Try the ultra-weak signal comparison and see what the difference is. Neil G4DBN On 07/11/2019 08:57, Thomas McQuiggan
wrote:
Yes, I live 1 mile away from WINTER HILL transmitter, but it causes me no problems on any other radio. -- Neil <a href="http://g4dbn.uk/"><small>g4dbn.uk</small></a>
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Re: FDM DUO INCREDIBLY NOISY!!!
#fdm-duo
Thomas McQuiggan <m7mcqio83ro@...>
Yes, I live 1 mile away from WINTER HILL transmitter, but it causes me no problems on any other radio.
I ripped out the shack last night to have a big tidy-up, so when it's all back together, I'll do some side-byside comparisons with my IC-7400 and see what happens. The radio is already much better after adjusting the AGC Threshold. Thanks guys, Tom - M7MCQ
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Re: Dimensions of the box the FDM Duo is shipped in
Thomas McQuiggan <m7mcqio83ro@...>
JUST BEAR IN MIND that the seller may send it as a box within a box to protect it, as my seller did. You might be wise to ask them if they're going to send it in the standard box. 73, M7MCQ
On Thu, 7 Nov 2019 at 02:43, KF4VAR <carrmccormackiii@...> wrote: Thanks so much!! Paul Jones this is great! Ditto Chris--- I did not even know what volumetric weight was until I was presented with the form.
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Re: Dimensions of the box the FDM Duo is shipped in
KF4VAR
Thanks so much!! Paul Jones this is great! Ditto Chris--- I did not even know what volumetric weight was until I was presented with the form.
Again many thanks both of you for the kindness. Be glad you dont live in Ecuador. Regards & 73 Carr KF4VAR
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Re: Dimensions of the box the FDM Duo is shipped in
Paul Jones
The box I ship in is 18in x 12in x 4in and the weight is 5 pounds
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Paul EladUSA
On Nov 6, 2019, at 20:54, KF4VAR <carrmccormackiii@...> wrote:
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Re: Dimensions of the box the FDM Duo is shipped in
New Zealand Post calculate the volumetric weight of this box as 1.73kg
Volumetric weight (kg) = [length(cm) x breadth(cm) x height(cm)] / 5,000cmCheers, Chris On 2019-11-07 15:06, Chris Mackerell wrote: Hi-- Chris Mackerell, 217 Sandy Bay-Marahau Road, Marahau R.D. 2, Motueka 7197, New Zealand Tel: +64 (3) 527-8540 Email: chris@owdjim.gen.nz
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Re: Dimensions of the box the FDM Duo is shipped in
Hi
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I have the box my DUOr came in - I'd expect the Duo to use the same box, but don't quote me on that! 38cm x 24cm x 9.5cm Cheers, Chris
On 2019-11-07 14:54, KF4VAR wrote:
As things continue here in Ecuador I have been getting some different --
Chris Mackerell, 217 Sandy Bay-Marahau Road, Marahau R.D. 2, Motueka 7197, New Zealand Tel: +64 (3) 527-8540 Email: chris@owdjim.gen.nz
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Dimensions of the box the FDM Duo is shipped in
KF4VAR
As things continue here in Ecuador I have been getting some different answers on how much duty I will pay for the buying and importing an FDM Duo. Some are as high as 60% duty (in which case I will move). I am currently working with DHL and among the information they have requested is 1)the dimensions of the box that the FDM Duo is shipped in and 2) the volumetric weight. I dont know much about the volumetric weight other than finding a few formulas to figure it but if someone out there has the shipping box that they received their FDM Duo in and can give me the approximate dimensions it would help greatly. On the website are the shipping weight of the FDM Duo and the size of the transceiver but nowhere to be found are the dimensions of the actual box that it is shipped in (nor the volumetric weight). I have written sales but have heard nothing so far. Any help would be most appreciated.
Thanks Carr KF4VAR
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Re: The inner workings of the DUOr SW2 AGC
AndersH
Thank you Neil!
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This is very good advice and also a good reason for me to obtain a more capable signal generator as compared to what I have today. My very best regards, Anders H.
On Wed, Nov 6, 2019 at 05:21 PM, Neil Smith G4DBN wrote:
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For Sale DUO-ART120 120W HF + 6m AMPLIFIER with ATU
ken araujo
For sale DUO-ART120 120W HF + 6m AMPLIFIER with ATU. This amp was purchased from Paul at Elad on may 22, 2019. I paid 1284.00 with shipping. Used this amp 2 or 3 times. Am selling it as I only use my Elad FDM Duo for qrp and rx. So the amp sits unused in as new condition in its original box. Comes with all original accessories cables etc. It is spotless but I just am not going to use it. Will sell for 950.00. I will pay shipping and accept paypal. Really a terrific deal if you would like the Duo-Art 120 with built in automatic antenna tuner and power supply. If it is not sold this week I will list it on Ebay. Thanks...Any questions you can reach me at email: volt@... or by phone at 3058723922. Also I am a verified member find me at qrz.com Call sign ka1zt...tnx Ken...
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Re: FDM DUO INCREDIBLY NOISY!!!
#fdm-duo
David Smith
You don’t have a Band II (88-108 MHz) transmitter nearby do you? I connected a renowned person-amp to my S2 and Holme Moss 8 miles away caused all sorts of problems
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73 M0OSA
On 5 Nov 2019, at 21:14, m7mcqio83ro@... wrote:
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Re: The inner workings of the DUOr SW2 AGC
Neil Smith G4DBN
It should be easy enough to characterise the response at various signal levels and AGC settings using a decent signal generator with programmable modulation. Also should be possible to look at the output from a 48/96kHz stream via a VRX as compared with the AF output. That way you could find the actual characteristics of the demodulated output and compare it directly with the input. Neil G4DBN On 06/11/2019 15:45, AndersH wrote:
Alan, -- Neil <a href="http://g4dbn.uk/"><small>g4dbn.uk</small></a>
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Re: The inner workings of the DUOr SW2 AGC
AndersH
Alan,
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I am often studying the spectrum from NDB stations as a part of NDB DX:ing. The signals are normally A3A, a few ones are A1A, I have noted (without claiming generality) that very strong pulsating side-bands can be a bit "rounded", whereas fainter pulsating side-bands are "more square". None of this interferes with my specialty, but it made me think about the amplitude versus gain characteristics in the signal chain. DX:ing is a hobby in a strong transitional phase with an ever increasing percentage of digital modes and pulse pattern detection techniques as part of the fun. I believe that there is no such thing as "obtaining too much knowledge": in this context. When we are no longer asking questions, we are probably already on the morgue.:-) All the best and 73! Anders H. SM6-8439
Perhaps you could detail the "phenomenon" that prompted your question.73 Alan G4ZFQ
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Re: The inner workings of the DUOr SW2 AGC
Alan
AndersH
Note email vianney@eladit.com I think he knows. Perhaps you could detail the "phenomenon" that prompted your question. 73 Alan G4ZFQ
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Re: The inner workings of the DUOr SW2 AGC
AndersH
Dear Vianney,
There are several SDR:s that are presented as direct sampling receivers, still they are employing a rather complex AD-conversion strategy with dynamic feedback. This feedback also acts as AGC in at least one implementation, hence my question. Not all receivers act as a simple linear black box between the antenna input and the resulting IQ stream. There is a lot more going on under the hood, as you surely appreciate. The devices that do employ a kind of "digital MF" are also "direct sampling", at least according to the marketing team of those companies. Maybe this is privileged information. Perhaps it has never been released in public. Nevertheless, I firmly believe that my question on AGC is relevant based on competing strategies used in the marketplace for one or two very recent SDR;s available today. If some models are "more direct than others" in their sampling we should talk about it in this forum, irrespective of my original AGC question. If you know for a fact that the ELAD AGC is implemented very late in the signal chain, all is fine, but please do not dismiss the subject as trivial, because it is not. All the best! Anders H.
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Re: CAN DUO ART 120 POWER-OUT BE ADJUSTED?
m7mcqio83ro@...
So it can't be adjusted from the ART's menus?
On Tue, 5 Nov 2019 at 22:07, mike bayard via Groups.Io <n8obu=yahoo.com@groups.io> wrote: Lower your drive and output will lower
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Re: CAN DUO ART 120 POWER-OUT BE ADJUSTED?
mike bayard
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