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Search results

  1. O

    Series Pass Modulator for D.I.Y. Hi-Fi & Asymmetry

    P.S. People will think it is the best damn radio they have ever heard!
  2. O

    Series Pass Modulator for D.I.Y. Hi-Fi & Asymmetry

    I have a NOS Uniden 78XL. I plan on doing the Gold Finger cap changes and setting it up for an Electret Condenser Mic. Probably a 1.5 watt to 2 watt dead key and a 2 pill amp behind it. On 99.9 of radio's it will sound 10-8 and Great! Most radio's will not pick up what Prime Minister is...
  3. O

    How are Sylvania/Phillips/RCA/ECG/NTE/CTC bipolar rf transistors compared to Motorolla/Toshiba/ST?

    Good to know. I have noticed that hfe's on chinese transistors are always on what we would consider low to medium gain back when Japanese and American transistors where the norm. The HG 2879 transistors I see online are usually in the high 50 to low 70 range. I have never seen or heard of...
  4. O

    How are Sylvania/Phillips/RCA/ECG/NTE/CTC bipolar rf transistors compared to Motorolla/Toshiba/ST?

    Yes hindsight is 20/20....LOL I wish I had stocked up when I was not in the hobby but was following along online. I do have some HG 2879's on hand.
  5. O

    Moto Beta hfe Letter/Color Chart by Low, Medium, High

    https://www.rfparts.com/old_site/transistors_info.html Sorry Code did not render correctly. Took sleeping pill have to go to bed link!
  6. O

    Moto Beta hfe Letter/Color Chart by Low, Medium, High

    Back to Transistors Home Motorola© Beta Coding Motorola© uses two methods to designate d.c. current gain (Beta) of popular RF Power Transistors; "Color Dot" and "Letter Code". (Note: some transistors may not carry the Beta test code.) Letter Code Color Dot High Beta Range Letter Code...
  7. O

    Texas Star ?

    Well DEI's and PP100's and a lot of the other's where made by HG. That is nothing against HG either. It took them a while to get to the 16D08 2SC2879 they currently sell. Many builders where happy to purchase cheap not yet ready for market Bipolar RF transistors with their own name on them for...
  8. O

    AM, SSB handheld radio (Magnum 1012 Clone)

    In Europe most places have size constraints and even cars for the masses tend to be much smaller. So compact things are often desired. Europe also has in general the most skilled and educated population. So you see a lot of custom fabrication of electronics and mechanical things of a lot of...
  9. O

    Black Stryker 955 replacement knobs

    What makes you think they would be common and available for purchase every where? How many radio's do you think Stryker sells? How many people do you think need or want replacement knobs for cosmetic reasons for a Stryker 955 on the Earth? If your logic holds true we should be able to find...
  10. O

    Home power supply for linear amp - ever used one of these type?

    Not used a PowerMax but I know plenty of people who have. CB is rather lucky because most of the noise most of these switchers make is not on 11m band. Notice I said "most"! I have used Samlex(sp) for a long time. A few years ago I purchased a bunch of server supplies NOS. I have a bunch of...
  11. O

    Home power supply for linear amp - ever used one of these type?

    Yes but the way in which most do it is not safe, durable or correct. You can actual purchase power supplies designed to be paralleled that have a master/slave setting just like a hard drive and they have a command line is daisy chained so that one unit commands them all. The load sensing on a...
  12. O

    Home power supply for linear amp - ever used one of these type?

    In 1993 in college I used a switcher because I was living in dorms and or apartments. Luging a linear steel core supply was expensive and awkward. I had to move out of the dorms ever 10 weeks. A 35A switcher powered my RCI2950 and 1 to 2 transistor amp just fine. It was common for guys to use...
  13. O

    Yeti Optima MKIII CB Mode Output Power?

    Mine is back in it's box and is in Amateur mode/export mode with continuous tuning. In that mode it keys a lot more than 4watts. The setting for locked into CB mode versus continuous tuning 10/11/12 meter is jumper defined. Need to build a new multi purpose beng/reloading/electronic bench. So...
  14. O

    What is the output power and swing of Yeti Optima MkIII in CB Mode?

    Does it put out 4 watts and not swing much more than 20 watts? I do not want to undo the continuous tuning mode and put it into CB mode just to find out that it swings widely to 40, 50, 60 watts in CB mode.
  15. O

    Yeti Optima MKIII CB Mode Output Power?

    In CB mode does it truly key 4 watts? What does it swing too? I want it to behave like a CB.
  16. O

    MotorMaul

    You should watch all the youtube video's over the decades if you can still find them. BBi did an interview with him a year or two ago I think.
  17. O

    Bye-bye 400 / 818

    What is really sad is they in the last 3 years they have not seen this coming? They have not redesigned with what is available? As I understand it the high end IC's are still available. It is a repeat of what has been going on int he auto industry due to reliance on cheap parts. So what we...
  18. O

    Anytone Ares 2

    I am betting that CObra or Uniden will have them remove the band switch and associated parts and take it down to a single final and make it a Cobra 148GTL or Uniden Grant XL. I hope they do not make this radio a full size 1970's chassis. I do not drive a pedo van or a 1980's Suburban. It would...
  19. O

    Anytone Ares 2

    Variable is nice on a real radio especialy one with 100w or more but on this a hi low should be sufficient. You can always alter components to adjust the high low if it does not have pots for that! Clearly it is designed tolook like a CB but also have a lot more channels than a CB. If you...
  20. O

    Anytone at-5555n II (version 2)

    Low freq. are not very intelligible and do not carry any real data for speech. Sounding like broadcast radio is not the best thing for being heard and understood on air with 4 watts! It takes a lot of audio bandwidth to carry all of that "sounds good" but non-essential data that is lows. It also...