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Thank you, Tim. That's certainly a better answer than assuming I want to overdrive it, or telling me what I already knew, that I needed to regulate it. I'll check RV1. I'm still a bit confused about

Thanks, Allison...looks interesting. Jack, W8TEE

Another that more closely resembles the V4 circuit with improvements. The two NPN can be 2n3904 and the pnp is 2n3906. I've used this flavor from 5V though 20V.? At 12V it will put 250mW in to a 8ohm

Tim no. The problem is if the first transistor Q71 is not biased to the half power supply point the output are both unbalanced and the bias is wrong.? IF Q71 collector is not at about 6V (for 12V

It's possible this might work on Linux with the Cheese application. I need to find out if this is so before I drop $200 for it though. Terry - KB8AMZ Brimfield Twp, OH USA EN91hd Linux User# 412308,

I've build SS amps for radios up to 350W and never had RF get into a power supply. I could understand if the antenna was poor and you had high shield currents but? a dummy load?? No. I'd suspect the

Understanding the circuit... Both the pre-driver and driver the pairs have their own (per transistor emitter resistors) and? the idea is to have the device operating at a reasonable point that being

As did I, David. Thanks for the reply. The popularity of the uBitX continues I see. Hal AC0AX

Bo, Heathkit was my great aspiration when I was a junior high school student, I remember. I feel the same heated atmosphere with uBITX this time. Thanks for your message, Bo. ARIGATO! // hiro, JJ1FXF

Thanks, Iz. I will try to find a silent 3-5A power supply, or maybe I can buy a standalone AC noise filer. // hiro, JJ1FXF 2018/06/30 5:57、iz oos <and2oosiz2@...>のメール:

This sure sounds like a good arrangement. tim ab0wr "Bill Cromwell" <wrcromwell@...> wrote:

Gwen, Anytime you control the amperage to a linear amplifier, such as with a current limiter, you make it non-linear. This will cause all kinds of inter-modulation products. It is similar to

sorry for bw..... finally found it.

Got it, Ralph. I will try to find a regulated, noise-filtered 12V 3-5A power supply today. Thanks for your specific advice. // hiro, JJ1FXF 2018/06/30 4:53、Ralph Mowery

Good morning, Bill and all. Thanks for your words. Well, I could sleep well. :) This is my first time to build up a transceiver in my life. uBITX really gives me a exciting opportunity that I

Three diodes won't fix the problem that the bias on the base of Q73 is highly dependent on Q71 collector voltage. If you ever redesign this circuit I would use capacitor coupling from the collector of

ian or anybody, I am trying to locate the actual source of Ian's files for the NEXTION displays to download. I have looked over Ian's web pages but just cannot find? a link to the files. Any ideas?

Thanks John, glad to hear you like the software. 73 Allard PE1NWL

“DId you parallel the emitter resistors too?“ A: R87&R88? No, I was not going to, have not done anything yet but order the 2N5109. “my 5109s wanted to sit there at 70ma and get very warm That is

Hal I ordered mine (6/21) and this morning (6/29) received notice it departed on DHL, estimated delivery (7/6) David KG7WFM