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Nick, The Spec Ft is the same for both 2N2222A and 2N3904 .....300 MHz, but the Ic max for the 2N2222A is more than twice that of the 2N3904. Someone (Allison ?) had mentioned the 2N3904s were really

Hello Ripley, Q92/Q93, Q96/Q97, Q911/Q912 73 Kees K5BCQ

Hello Art, A complete 6x kit includes: a 6x board, 12 relays, 6 blank LPF boards, headers, diodes, capacitors and a 6 position rotary switch for $30 plus $4 for postage in the USA. 73 Kees K5BCQ

$0.0358 each is not bad. Let us know how this goes. Moving to a BS170 would take significant changes to the circuit. A 2n5109 or 2n3866 is going to cost more than $0.0358 I'd probably build a really

Hello Kees, I replaced the two pair of driver transistors with metal can 2N2222As early on in my build per Allison’s recommendation to even out the power across the bands. What is the third pair of

Most semiconductor FAB shops use ring oscillators spread at strategic location on a wafer to characterize transistor behavior parameters. This is one of the most common techniques to validating the

Jerry, I just bought 50 of them for $3.58 including postage from a USA seller. 73 Kees K5BCQ

Hi Henning, No, for 80m it works just the same way as for 40m. For LSB we use low side injection, for USB we use the high side. on 40m (e.g. 7MHz): in LSB mode: fLO = 12 - 7 = 5 MHz (= "low side") in

Art, i found this, but its over my head for now:?https://community.cadence.com/cadence_blogs_8/b/rf/posts/measuring-transistor-ft

I sent you an email as well Kees.? Thanks for all your effort in all this!

Awesome Kees!? ?I'll take a complete 6x kit (or as complete as you can make one).? PayPal an invoice to jrsphoto@...? I'll put the 4x board in my portable build but plans for a more desktop

Jerry Since the FT is what we need to know for transistor swaps, it might be possible to make an oscillator circuit that tunes across the predicted FT value. Point where the oscillator stops or will

Kees: How much is the complete 6x kit? David A Posthuma, WD8PUO 1 (616) 283-7703 Sent: Thursday, September 13, 2018 4:38 PM To: [email protected] Subject: Re: [BITX20] K5BCQ uBITX Relay Switched

Kees, Otherwise unobtainable plastic 2n2222A's available for pennies on ebay? In this particular case, I'm not so sure about the first part in "Trust, but verify".? But certainly possible, the recipe

Kees, I would like a complete 6x kit – please send paypal request to olson339@... <mailto:olson339@...> for payment 73 Art – N2AJO Sent: Thursday, September 13, 2018 2:50 PM To:

I think enough work has been done to say the 3 sets of 2N3904 transistors should be replaced with 3 sets of 2N2222A transistors. The 2N2222A is a great transistor but has been around a while and most

Ion, Hey guys, I am an idiot.? My BFO freq. was way off.? The only way I found out was running Ubitx manager to see the saved setting. There was incorrect data entered at one time or another.?

Allard, in addition the "high side" injection must be used and chosen, because fin = fLO - Fif; e.g. fin = 3.5 MHz Fif = 12 MHz then fLO = 15.5 MHz. The "low side injection" as used in the BITX40 does

I downloaded V1.1 and XLOADED the 16P version it to my uBITX V3. ?All I have now is a top line of boxes on my standard isssue display and XLOADER will no longer work in order to re-install V1.061.

Hi Kees at what price for France? 73 QRO Gilles F1BFU / FR 2018-09-13 20:49 GMT+02:00 Kees T <windy10605@...>: -- Gilles - F1BFU/FR