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JNCRadio VNA 3G - Vector Network Analyzer - 50k to 3GHz
According to: the product is NOT available to the normal consumer, if I read the ad correctly.
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Mike C. On 1/15/2022 3:25 PM, Jeff Green wrote:
Posted on the road. |
On 1/15/22 4:43 PM, Jeff Green wrote:
Posted from a Wendy's in Bardstown (it sucks).copper foil tape is readily available, has a conductive adhesive, and works quite well. It's available in a variety of widths. Thin copper foil is also available - it's used by people making electric guitars and similar.? Some Scotch 77 or 74 spray adhesive and it's not coming off very easily. The shielding effectiveness is tricky to estimate. Most leakage is from wires that penetrate the shielding (so your USB cable). Second would be leakage through slits or gaps in the shielding - you need the perimeter of the hole to be << 1/2 wavelength, so at HF, that's pretty easy. At HF, the challenge is skin depth. The shielding needs to be > 5 skin depths. Skin depth in copper at 1 MHz is about 2.5 mils (0.0025 inches, 64 microns), so your shield would need to be 12 mils thick, which is a lot of 1 mil thick tape.? On the other hand, 0.032 aluminum (20 ga) is pretty good. is your friend. One also needs to worry about magnetic fields, for which lossy ferrite material in an elastomer are useful.
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MIL-SPEC is applied to an item that meets or exceeds the Milatary specifications that is effect for that product being made.
The Company I worked for built products for the military. Power supplies for Amram, HV power suppies for several Headsup displays on Milatary Jets and Subs, as well as power converters and magnetics for most every Air plane manufacturer in the Free World. Retired Electronics Manufactureing Engineer of 35 years at OECO LLC, Milwaukie, Oregon Clyde Lambert KC7BJE |
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