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Yeah, usually are heavy as they are meant to withstand quite some power. If you build one with a 9:1 unun plus a choke and a 560ohm non inductive resistor you won't have the same of a BW but close and

I buy my RD16s from POLIDA too and they are genuine parts. For a first time buyer though, best buy them from RF Parts, Digikey, or Mouser. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ

Welp lesson learn. Anybody know the best place to buy the right ones?

Yea I see now Jerry. These look like the fake ones that vk4adc had. Also have 5 coming from china but they look like there going to be fake too. Bummer. I did try these but they did some weird stuff

9 times out of 10, any mosfet or transistor that I've gotten from eBay is counterfeit or substandard. Don't go with them unless you have the capability to be able to test the suspect part with the

Not sure what you mean by "they are IRF"? The pin out for RD16HHF1 are gate source drain. These as tested are gate drain source like the IRF 510. I? would think all RD16HHF1 would be pined the same

Which BITX ?

Could well be fakes ? ??https://www.vk4adc.com/web/ebay-scams/173-beware-fake-semis ? ??https://www.eham.net/ehamforum/smf/index.php?topic=113319.0 They even fake the IRF510: ?

They are IRF, I have tested them in place of IRF in Bitx40 and they work perfectly. If they are around 5$ then they are genuine imho. I have bought from this guy below and it was genuine

OK... Parts delivered and I'm back at it. I pulled the TDA2822M chip with the WX identifier and replaced it with a socket and a new TDA2822M by ST Microelectronics. So hooked it all back up and still

Got 2 RD16HHF1 off E bay .?https://www.ebay.com/itm/RD16HHF1-TO-220-Mitsubishi-HF-RF-Power-MOSFET/291322273944.? They are clearly labeled as such but the pin out test as GDS instead of GSD. Pretty

So with this mod I can just drop in the RD16HHF1 (crossing the drain and source)? And set bias for 250ma each?

Tim I not sure if anyone has answered your request yet but I made some measurements on my uBITX. My Voltages at the same points you showed: TX 12.2vdc R66,R65 junction 11.86vdc R65, C63, Q6 collector

Hello folks, I need some ideas on what might be the cause of tight audio, that’s the complaint I get from others so I’m guessing that the audio output from the mike is narrow. I’ve checked the

I spent the last 10 years of my professional career designing intraoral sensors for Schick/Sirona/Dentsply. We routinely worked with 0201 parts. They were too small for me to work on, but our

Vgs(thresh) spec for the IRF510 is min of 2v, max of 4v,? ?fifth spec down on page two of the datasheet: ? ??https://www.vishay.com/docs/91015/sihf510.pdf This means the gate voltage for a

Try cutting the bias pots to minimum bias. Then turn one of them up to the desired bias. Then turn it back to minimum. Then try turning the other pot to the desired bias. If each pot will adjust the

This is the error I get when trying to compile the original code.? Arduino: 1.8.6 Hourly Build 2018/05/03 04:12 (Mac OS X), Board: "Arduino Nano, ATmega328P" ? Build options changed, rebuilding all

Kees, Well you certainly got this discussion going hot and heavy. Thanks 73 Bill WA8VIH

Did he acknowledge receipt of order after you ordered and sent the money. ?There were 71 available when I ordered. ?Do you just have to sit tight until notified by PayPal? ?I sent an email,but no