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Same here, that is why I only use ATC ceramic capacitors. Very high Q, very low ESR, specifically made for RF applications. Cost more, but you can't beat them.

Thank you for that information. I went here and read about capacitor dielectrics https://www.allaboutcircuits.com/technical-articles/x7r-x5r-c0g...-a-concise-guide-to-ceramic-capacitor-types/

NP0 or C0G ia what you want. The capacitors should have a good Q. They will otherwise be lossy and the filter won't be sharp. For years I tried building filters with regular disc ceramics. They had

Jerry, Try a 10K resistor from M1 to ground to keep the cap from charging/discharging through the amp input. If it helps try a lower value down to 1K.. Raj

I am at our off-grid cabin for the summer and have brought by uBITX with me.? With the low noise floor and elevation the BITX has really shined.? This afternoon I made a 20M contact to the Slovak

So - my wife was complaining about all the noise my radio was making. So I plugged in a headset. Whoo - there's a station! Let's call him! I pressed the mike button ( for the first time ), and an

Robert, Sorry, that I took so long to respond.? I was on a fishing trip and did not really have time to get to the shack until tonight. As to the buck converter, It may work.? The issue will be the

Thanks cdt The Emblaser 2 costs about $2500, but you can really do a lot of things with this laser. Especially front panels, signs, etc. The 5-band equalizer I have built with the BA3812L IC. Works

hello My choice must be made on these 4 models. I have to balance quantity/price/quality Otherwise, the Rolls, is that it? Recherche : 100pf hq - L'IMPULSION - Vente de composants électroniques et

Yes, this is possible if you paint the copper surface with black coating in advance. Depending on the thickness of the copper layer, the tracks would have to be lasered in several passes. It also

If you bought them from HobbyPCB, (Jim Veach), you know they are originals. Jim makes one of the best HF amp kits in the world and uses these FET's in them. My HardRock 50 amp is still going strong

Would it engrave thin copper? Like on a circuit board? - Jerry KF6VB

Hello, Beautiful video I don’t know the price of that laser, but he’s doing a good job. For a 5 band equalizer, we can use this chip for example! Schematic: LA3600 Equalizer 5 band

On my Transkomm YouTube channel https://www.youtube.com/channel/UC1BkwU6aCCJtxU1rvLsir2g I have some presented some equipment where I have made the front panel with my laser system. In this video for

I tested them and they are performing according to the spec sheet. The appear to be originals.

Gerard Neat looking crystal filters. Making them plug-in could offer additional flexibility over hard-wired filters. As you probably already know, the change from 12.0 to 11.059 was because the USB

NPO capacitors are Class 1 capacitors which are more stable and designed for resonant circuits. You have a better chance of getting a capacitor of this type with a low RF ESR

Gerard, I believe that this was done by Dr. Lee to get closer to the skirt of the 45MHz roofing filter so that the Attn function would kick in sooner.? I am guessing here, however, the crystal filter

Does the temp coefficient matter? This isn't a VFO. I just looked it up - X7R is considered relatively temperature stable. I found a graph - the capacitance peaks around 20C, and at 0C and 40C it will

Hi, In Linux you can batch resize files in seconds using the command line.? Might save time if there are a lot of similar size images. 73.