LNAs are needed at higher frequencies. The natural noise level is high on 80 meters.
@dmbworks80945 ай бұрын
i worked on an LNA housing for boeing satellite systems advanced design team. it had 4 LNA's with 4 mirrored and 8 redundant LNA's. ill never forget all the #0's screws for the waveguide covers haha.
@DutchmanRadio5 ай бұрын
Good stuff sir!
@sunplio
5 ай бұрын
I hope it is simple and easy to grasp for the newbie. Thanks!
@nixraff7802Ай бұрын
The rf-in and rf-out are not labeled on the housing of the LNA device. The dc connector is on the rf-in side, it should be on the rf-out side. The MMIC amp chip has only *one* uni-directional diode for protection. So in reality you should need two of them antiparallel. Or better: an bi-directional protection. 😇 There are many reports of malfunctions at this type of LNA...
@danedewaard82155 ай бұрын
I'm just wondering if the LNA is REALLY in pass-thru mode when not powered??? My RTL-SDR V4 is so sensitive that it does not need the help of an LNA!!!
@sunplio
5 ай бұрын
No passive mode. It's heavily attenuated with no power to lna.
@Robyn.....................2545 ай бұрын
Hi is it possable to use this on a quansheng?many thanks 🇬🇧
@sunplio
5 ай бұрын
LNA's are for receivers and won't transmit. You can use it on that HT but if you try to transmit through a LNA you risk burning up the LNA and or radio output finals. You need to have a linear amplifier for the 2m/70cm Quansheng, All of the Quansheng HT's need the operator to have the proper license. Not going to discuss licensing.
Пікірлер: 9
LNAs are needed at higher frequencies. The natural noise level is high on 80 meters.
i worked on an LNA housing for boeing satellite systems advanced design team. it had 4 LNA's with 4 mirrored and 8 redundant LNA's. ill never forget all the #0's screws for the waveguide covers haha.
Good stuff sir!
@sunplio
5 ай бұрын
I hope it is simple and easy to grasp for the newbie. Thanks!
The rf-in and rf-out are not labeled on the housing of the LNA device. The dc connector is on the rf-in side, it should be on the rf-out side. The MMIC amp chip has only *one* uni-directional diode for protection. So in reality you should need two of them antiparallel. Or better: an bi-directional protection. 😇 There are many reports of malfunctions at this type of LNA...
I'm just wondering if the LNA is REALLY in pass-thru mode when not powered??? My RTL-SDR V4 is so sensitive that it does not need the help of an LNA!!!
@sunplio
5 ай бұрын
No passive mode. It's heavily attenuated with no power to lna.
Hi is it possable to use this on a quansheng?many thanks 🇬🇧
@sunplio
5 ай бұрын
LNA's are for receivers and won't transmit. You can use it on that HT but if you try to transmit through a LNA you risk burning up the LNA and or radio output finals. You need to have a linear amplifier for the 2m/70cm Quansheng, All of the Quansheng HT's need the operator to have the proper license. Not going to discuss licensing.