Hello Mr Brian. Thanks for watching. I think this potentiometer is for the Negative feedback adjustment of the preamplifier. Please watch the following video.73s Tengu
@@Ken.s_BCL-LogVideo Thanks Mr. Tengu...I'll give it a try and test it for a couple of days. I have to replace the Wire loop maybe with 1/4 inch copper tubing, then deploy it in a semi permanent location. The information you provided is very valuable to us all. As my wife would say; "Helping together makes a happy family". 73s Brian
Hello my friend. When I tested it at the company where I work, it was about 30m above the ground. When used at home, the height above the ground is about 15m. Sorry for the late reply. Thanks for the message.73s!
Excellent video, thank you! If I wanted to minimize bleed over or cross modulation from strong Medium Wave signals, does it matter if I adjust the gain screw in the box at the loop or the attenuator screw in the box at the power source? Or are they basically doing the same thing? Thank you
Hello. Thank you for visiting. If MW cross-modulation occurs, adjusting the loop box potentiometer will improve it. The attenuator is attached to the power supply side (bias-T side). No adjustment is required for communication type receivers. If you adjust it when receiving with a normal shortwave radio, the reception distortion may be improved. I wish you success.73s!!
Hello, Mr. Brian Veitenheimer. The total rotation angle of the potentiometer is approximately 300 degrees. I turn right about 180 degrees. I turned it about 120 degrees to the left. Different products have different default locations. I think it's good to mark with a marker before turning. Thanks for watching.73s Tengu
Hello. This antenna is a small-diameter magnetic loop antenna with a built-in differential amplifier circuit and a high-cut filter that blocks the FM band. I think it is suitable for receiving long-distance shortwave broadcasts in areas with a lot of electromagnetic noise in urban areas or areas with strong FM radio waves. However, since there is internal noise from the general-purpose video amplifier used in the amplification circuit and boost inverter noise from the power supply circuit, I think it is inferior to a properly tuned long wire antenna installed in the suburbs with less electromagnetic noise. Thanks for the message.
I have seen some videos, in which is said, that the delievered antenna cable is crap and should be replaced through a thicker cable. Also a BNC-connector should be build in.
Hello. Thank you for viewing. Changing to a BNC is easy. However, the effect is limited. This is because the attenuation rate of the signal amplified by the MLA30 is relatively small compared to the attenuation rate of the original signal. th-cam.com/video/jLdqEIpPUr4/w-d-xo.html
Yes, that's right. But the circuit is hardened with resin. It seems difficult to modify. By the way, if lower the gain a little, there will be no cross modulation even at night. The sensitivity seems to be good. I will challenge Africa reception with this antenna tonight. Thanks for watching.73s!
Hello. My friend's MLA30+ had the same specifications. However, I cannot guarantee that the specifications may change in the future. thanks for watching.
Yes, this SG outputs 10,000 kHz (10 MHz). I do not know the reason why the change with MW occurred. The radio side is a rig, so I don't think the MW signal will saturate. It is assumed that something has happened on the antenna side. Thanks for watching.73s Tengu
Interesting. Have you noticed there's another potentiometer in the power unit? Do you know what that does? It is marked ATT. Presumably it means attenuator. Maybe it does the same thing.
Hello, Thank you very much for watching. The coaxial cables of the MLA -30 are thin and cheap, so they are often affected by electromagnetic noise. I think it is better to change it to RG 58/U.73s!!
Hello Sir, wouldn't it make sense to adjust it in the middle of its band? At 15MHz? Also I have noticed that there are some trimming potentiometers in the bias-T box.
I agree. I think it is better to adjust at the frequency you use often. Yes, as you say, the bias T-box has a built-in output attenuator. Thank you for your comment.73s Tengu🌈📻
What a superb and simple tweak. Only recent;y received my MLA-30 . What a difference! Many thanks.
Hello, Thank you for taking a look. By the way, please make adjustments at your own risk. This antenna is great.73s Tengu :-)
@@Ken.s_BCL-LogVideo Where is the risk? is there anything what could be damaged?
Excelente trabajo Tengu. Gracias por compartir y estaré atento a tus andanzas en tierras africanas. 73.
Hello, Mr. Onda. Thanks for watching. CNR1 was strong last night. However, Africa received only the last two minutes of the broadcast.73s Tengu
Great demonstration
Hello. Thank you for watching.
Tengoo, thanks for uploading. Nice video to show us how to tune up. '73 !
Hello, dear Sakura. Thank you for watching. This video is standing in your role, I am very happy. I wish you a wonderful DX.73s Tengu:-)
Thanks Mr. Tengu for the information, great work my friend. 73s Brian
Hello Mr Brian. Thanks for watching. I think this potentiometer is for the Negative feedback adjustment of the preamplifier. Please watch the following video.73s Tengu
@@Ken.s_BCL-LogVideo Thanks Mr. Tengu...I'll give it a try and test it for a couple of days. I have to replace the Wire loop maybe with 1/4 inch copper tubing, then deploy it in a semi permanent location. The information you provided is very valuable to us all. As my wife would say; "Helping together makes a happy family". 73s Brian
Thanks for this demonstration, very useful. 73s!
Hello Mad Radio DXer. Thanks for watching. It's a lot of fun to look into things that don't have instructions.73s Tengu
Excellent work friend.
At what height did you place your MLA30 antenna?
73 From Mexico.
Hello my friend. When I tested it at the company where I work, it was about 30m above the ground. When used at home, the height above the ground is about 15m. Sorry for the late reply. Thanks for the message.73s!
Excellent video, thank you! If I wanted to minimize bleed over or cross modulation from strong Medium Wave signals, does it matter if I adjust the gain screw in the box at the loop or the attenuator screw in the box at the power source? Or are they basically doing the same thing? Thank you
Hello. Thank you for visiting. If MW cross-modulation occurs, adjusting the loop box potentiometer will improve it.
The attenuator is attached to the power supply side (bias-T side). No adjustment is required for communication type receivers. If you adjust it when receiving with a normal shortwave radio, the reception distortion may be improved. I wish you success.73s!!
Very nice video my friend! Thanks for explaining with kindness! 73s!
Thank you for watching. Yes, this cheap antenna is very interesting.73s!!🌈
Great video, very useful info. 73's
Thank you for watching. I hope you find it useful.73s Tengu📻
How much are you turning the pot? 1/8th turn? 1/4 turn? Thanks
Hello, Mr. Brian Veitenheimer. The total rotation angle of the potentiometer is approximately 300 degrees. I turn right about 180 degrees. I turned it about 120 degrees to the left. Different products have different default locations. I think it's good to mark with a marker before turning. Thanks for watching.73s Tengu
I rotated mine counterclockwise until it reaches the end stop which was less than 90 degrees. I'll leave it there for the time being. Brilliant.
Hi, how does this perform compared to a long wire antenna?
Hello. This antenna is a small-diameter magnetic loop antenna with a built-in differential amplifier circuit and a high-cut filter that blocks the FM band. I think it is suitable for receiving long-distance shortwave broadcasts in areas with a lot of electromagnetic noise in urban areas or areas with strong FM radio waves. However, since there is internal noise from the general-purpose video amplifier used in the amplification circuit and boost inverter noise from the power supply circuit, I think it is inferior to a properly tuned long wire antenna installed in the suburbs with less electromagnetic noise. Thanks for the message.
I have seen some videos, in which is said, that the delievered antenna cable is crap and should be replaced through a thicker cable. Also a BNC-connector should be build in.
Hello. Thank you for viewing. Changing to a BNC is easy. However, the effect is limited. This is because the attenuation rate of the signal amplified by the MLA30 is relatively small compared to the attenuation rate of the original signal.
th-cam.com/video/jLdqEIpPUr4/w-d-xo.html
@@Ken.s_BCL-LogVideo Aah, okay 👍
Thanks for the demonstration. It would be handy if the gain could be controlled with an external knob... 73
Yes, that's right. But the circuit is hardened with resin. It seems difficult to modify. By the way, if lower the gain a little, there will be no cross modulation even at night. The sensitivity seems to be good. I will challenge Africa reception with this antenna tonight. Thanks for watching.73s!
Yes that would be handy...it shouldn't be that hard to modify for someone really smart like you Adrian. 73s
@@MrBrian8749 LOL, it would probably catch fire the minute I go anywhere near it.
@@ado75 😂😂😂😂😂
Does this apply to the mla+ too
Hello. My friend's MLA30+ had the same specifications. However, I cannot guarantee that the specifications may change in the future. thanks for watching.
Is that a pirate 10000 kHz signal or off center on 9999 or 10001 kHz.
Yes, this SG outputs 10,000 kHz (10 MHz). I do not know the reason why the change with MW occurred. The radio side is a rig, so I don't think the MW signal will saturate. It is assumed that something has happened on the antenna side. Thanks for watching.73s Tengu
Interesting. Have you noticed there's another potentiometer in the power unit? Do you know what that does? It is marked ATT. Presumably it means attenuator. Maybe it does the same thing.
こんにちは。ご清覧ありがとうございました。はい、Power Uniを開きました。私は蓋を開けたいと思う性格を持っています。そのとおり。ATTはアッテネーターの略です。最大で、3つの無線が接続されていてもゲインはまったく低下しませんでした。
Her amplifier very noisy, when i short input and turn on power noise increases to 12db. My homebrew copy of blue wave magloop have noise only 2 db.
Hello, Thank you very much for watching. The coaxial cables of the MLA -30 are thin and cheap, so they are often affected by electromagnetic noise. I think it is better to change it to RG 58/U.73s!!
Very helpful. What is your callsign? de ON8EI John.
Indeed very useful Tengu! Thanks. I have the WBL-01 which seems identical to the MLA-30. 73s Ralf
Thank you for your comment, Mr. Ralf. I think the manufacturer is the same. The model number may be changed because the market is different.73s Tengu
Thanks.
Hello, Thank you to stop by.73s Tengu(^^)/
Hello Sir, wouldn't it make sense to adjust it in the middle of its band? At 15MHz? Also I have noticed that there are some trimming potentiometers in the bias-T box.
I agree. I think it is better to adjust at the frequency you use often. Yes, as you say, the bias T-box has a built-in output attenuator. Thank you for your comment.73s Tengu🌈📻
Looks like you had 20db att engaged
Hi, that's true. Many tnx for feedback.73's Ken
No you just made a gain to get splash over, drifting not desired by many.
Hello, Thank you for comment. I'm sorry, I don't understand your comment.73s!!