• You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
  • Notice: You may not use this site to facilitate the unauthorized selling of copyrighted material including, but not limited to, in the public dxForums, dxGallery, dxChat and private messsages. If you get caught doing this, you will be permanently banned with no second chances. A notice will be placed on the site of why you were banned and any information collected by this site about you will be made known to the copyright holder.

Search results

  1. Radioman56

    Siltronix VFO, boosting the drive level.

    Well my fellow electronics-competent Folks., I just found another inexpensive & easy way to get even a bit more output from your Siltronix VFO 90., or any other brand of VFO (ie: a PAL, Glen, etc.) along with a better (higher) impedance-match, especially for tube-type equipment.! It's simply...
  2. Radioman56

    Siltronix VFO, boosting the drive level.

    Yes., please check one of yours.!, and if it's not already buffered / amplified with one of those external boards., check-out what a difference R6 can make.! :) As the bottom-line is (and just finished that job a few days ago), is that the output did go up from ~50mv to ~300mv, and most likely...
  3. Radioman56

    Siltronix VFO, boosting the drive level.

    Re: Siltronix VFO., boosting the output drive level (easy fix I just found.?!) Although I've never had the "joy" of dealing with this particular VFO (the Siltronix model-90) I believe I found an incredibly EASY way to boost its output (some model-years that is) to SIX times its value.! :-)...
  4. Radioman56

    Replacement 2879's

    The MicroSemi, MS-1051 is a quiet good / rugged replacement for the Toshiba's (FYI: Actually, the non red-dot Toshiba's were better than the red-dot devices, as they had Beryllia-Ceramics for better chip to substrate heat transfer)., though the MS-1051s are a bit "pricey" ($50+ ea.) as compared...
  5. Radioman56

    B2500A

    I know this is a VERY old thread here., but just as an "FYI to anyone reading this., I just finished doing some MAJOR repair work on one of those B2500A amplifiers (for a customer in Cape Cod) which had been TOTALLY "cobbled-up" by one of those so-called / wanna-be "tech" guys, and purchased...
  6. Radioman56

    Palomar Electronics Max-Mod. Spoiler alert!

    You're spot-on there sir.! (y) Correct (x2) again.!! :) You're certainly quite correct with the above two statements, but., a plate-modulated, RF-final tube does not reach 0 volts during the negative going halves of the audio modulation voltage. :oops: Take for example, a Browning Mk-4. The...
  7. Radioman56

    Palomar Electronics Max-Mod. Spoiler alert!

    *** And here's a web-link to a "photo-article" I had produced, concerning a customer's Galaxy DX-95T mobile-radio in the hope to illustrate to others this principal of what I call fake / air-watts, that's got some pretty good "before & after" photos, and showing a side-by-side comparison of an...
  8. Radioman56

    Palomar Electronics Max-Mod. Spoiler alert!

    First-off., I know I'll be most likely be "stepping on some feet" here :( and to others, just "preaching to the choir".!:D But feel the need produce a somewhat mini-novel length of an "explanatory-rant" concerning a few "pet-peeve" subjects of mine, but will also WELCOME any additions...
  9. Radioman56

    Palomar Electronics Max-Mod. Spoiler alert!

    Well.., maybe not in the short run sir...(y) But just just let that "volted-final" run a while., and especially accompanied with the typically "clipped" and / or "cranked-up" and / or "missing" AMC circuitry., and Ka-Boom., there go's your looong-gone ("rare-as-Hen's-teeth") 2SC-1969 final...
  10. Radioman56

    Palomar Electronics Max-Mod. Spoiler alert!

    I can somewhat understand why you'd like to eliminate the small amount of voltage loss that can occur through the power-regulator (even when it's in its "fully-saturated" condition) while the RF-chain is in the SSB mode (as in some cases, that could / might be a GOOD idea.?) but there's also a...
  11. Radioman56

    Palomar Electronics Max-Mod. Spoiler alert!

    Thanks for making me aware of the "TinyCad" source. (y) It's just that over the years, I've come to discover a few GREAT little (and VERY useful.!) free AND safe programs, such as (but certainly not limited to.!) "Audacity"., "MP3-Gain"., etc. :) Never knew they were just a repository for...
  12. Radioman56

    Palomar Electronics Max-Mod. Spoiler alert!

    Thank ya much for the compliment sir (y) And as to "the-why" almost ALL manufactures have been placing the "hottest-running" transistor in such radios (especially in the "dual-final" models.!) in such a TERRIBLY heat-trapped section "under-the-hood"., all I can say to such a question is...
  13. Radioman56

    Palomar Electronics Max-Mod. Spoiler alert!

    Thank you VERY kindly for your "words-of-support" sir (y) as I did spend a good amount of time creating it.!!
  14. Radioman56

    Palomar Electronics Max-Mod. Spoiler alert!

    The AM modulation / Power-Control, Pass-Transistor
  15. Radioman56

    CbTricks.com FORUM - MEMBERS

    I had made a "relatively-nice" donation to CBT some years back, and received in return, a GREAT set of 4-DVDs, which contained almost 15 Gb of files.!! I would GLADLY donate again to help support the folks who are making (and had made) such a GREAT "contribution to the cause" (and hopefully an...