Date   

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.
INNER BOX dimensions (an ELAD box) - 380X240X95mm.

David G8IIC



On 7 Nov 2019, at 08:52, Thomas McQuiggan <m7mcqio83ro@...> wrote:

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.

Again many thanks both of you for the kindness. Be glad you dont live in Ecuador.

Regards & 73
Carr KF4VAR


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.

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



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.

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



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.

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
-- 
Neil
<a href="http://g4dbn.uk/"><small>g4dbn.uk</small></a>


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


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.

Again many thanks both of you for the kindness. Be glad you dont live in Ecuador.

Regards & 73
Carr KF4VAR


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


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 

Paul EladUSA


On Nov 6, 2019, at 20:54, KF4VAR <carrmccormackiii@...> wrote:

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


Re: Dimensions of the box the FDM Duo is shipped in

Chris Mackerell
 

New Zealand Post calculate the volumetric weight of this box as 1.73kg

Volumetric weight (kg) = [length(cm) x breadth(cm) x height(cm)] / 5,000cm
Cheers, Chris

On 2019-11-07 15:06, Chris Mackerell wrote:
Hi

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
--
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


Re: Dimensions of the box the FDM Duo is shipped in

Chris Mackerell
 

Hi

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
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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R.D. 2, Motueka 7197, New Zealand
Tel: +64 (3) 527-8540 Email: chris@owdjim.gen.nz


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


Re: The inner workings of the DUOr SW2 AGC

AndersH
 

Thank you Neil!

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:

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


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... 


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 

73 M0OSA 


On 5 Nov 2019, at 21:14, m7mcqio83ro@... wrote:

Hi Klaus, I have no HAM/CB operators nearby.
As for my shack's  240V, it all runs through one socket which goes through this home-made FILTER.

<MainsFilter.jpg>


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,
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
-- 
Neil
<a href="http://g4dbn.uk/"><small>g4dbn.uk</small></a>


Re: The inner workings of the DUOr SW2 AGC

AndersH
 

Alan,
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


Re: The inner workings of the DUOr SW2 AGC

Alan
 

AndersH


If you know for a fact that the ELAD AGC is implemented very late in the signal chain, all is fine,
Note email vianney@eladit.com I think he knows.
Perhaps you could detail the "phenomenon" that prompted your question.

73 Alan G4ZFQ


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.


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 


On Tue, Nov 5, 2019 at 4:42 PM, m7mcqio83ro@...
My DUO ART should arrive tomorrow. Is the output ALWAYS high or can the power output be lowered??

TIA 

Tom - M7MCQ


Re: CAN DUO ART 120 POWER-OUT BE ADJUSTED?

mike bayard
 

Lower your drive and output  will lower 


On Tue, Nov 5, 2019 at 4:42 PM, m7mcqio83ro@...
<m7mcqio83ro@...> wrote:
My DUO ART should arrive tomorrow. Is the output ALWAYS high or can the power output be lowered??

TIA 

Tom - M7MCQ

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