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The "bias-t" network shown in fig 2 of the datasheet on page 6 of the BGA616 is just an inductor up to the dc supply resistor plus a series cap to the following stage: ?

Max supply voltage on an MMIC is a function of the supply resistor you choose. Only the output pin itself is limited to 4.5v absolute max for supply voltage with respect to ground, and that does not

the temperatures taken with a sensor probe that sits on the heat sink of that transistor inside the enclosure closed up, and I would never take it outside. I do all of my radio stuff in the house.

If they're similar to MARS MMIC, input and output MUST be 50 ohms. 73 Ken VA3ABN wrote:

WARNING: Max Vd on that part is 4.5VDC !!! Sent: Tuesday, August 21, 2018 2:30 PM To: [email protected] Subject: Re: [BITX20] Wow... 15 volts in and a bunch out.. So I read the BGA616. $1.50 from

So I read the BGA616. $1.50 from Digikey https://www.digikey.com/product-detail/en/infineon-technologies/BGA616H6327XTSA1/BGA616H6327XTSA1CT-ND/2410159? I see you provide a 33 ohm collector load

Oh, I haven't done it. Just kibitzing. It could be another npn gain stage, just that an mmic involves fewer parts, so easier to patch in ugly-style on the bottom ground plane. An example might be U2

Can the RD16HHF1 be used as a drop in replacement for the 510 or will these mods have to be made? Just looking to get my uBitx back on the air. Seems like a good idea to place these in the finals to

Hi Jerry, can you produce a schematic with parts numbers on exactly how to do that? I’ve never used one of those components before. It should be easy to reduce gain in previous day just by simply

My 2-cents worth, homebrewtestequipment, homebrew test equipment, or DIYtestequipment? My first choice when using a search engine is the four words home brew test equipment or three words if you

An MMIC between Q90 and RV1 is an easy way to add an extra stage. ?/g/BITX20/message/51211 Of course, you still have to adjust the other stages to distribute the gain properly.

Thanks Darren - works great. 73, Bill

Allison, what about adding an additional stage after the last mixer in the transmitter lineup? Better choice of transistors (replace Q90 and maybe the other 3904’s)... add (insert) a tiny daughter

Tom, As a follow up I've built my own amp and also worked with Hands on his and? as a result I have two different amps that can do 3-30mhz with nearly flat power and very linear.? That's at 12V (not

Tom, Back when I was resorting to the full bag of tricks the goal was not more power! The goal was even power from 80 through 10 and improved distortion levels. Alas, the were other issues found that

Jack, Very interesting. Thanks. Tom, wb6b

So a question. I know some of the power boost suggestions like shorting out parts the were put there to provide stability in the amplifiers or overdriving the audio, do indeed increase power, but at

If you want SWR only I just got a nice cross needle MFJ-822.?? It covers 1.8-200 MHz, 30 or 300 Watts.? On the 30 watt range half scale is about 7 watts. -- Lee - N9LO?"I Void Warranties"

Tom: You can get a marginal speed improvement by moving the data definitions out of the loops. For example: #define ELEMENTS(x)? (sizeof(x) / sizeof(x[0]))? // Gets rid of "magic numbers" in the