¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. Qrptech
  2. Messages
Single Messages Topics Expanded Polls

Re: Send in your QRP Pictures!

 

Lee,
Not really interested in refurbishing. I want to make something my own. This is almost like the OMs who answer my homebrewing questions with "why not just go buy ___?". I know people mean well but I would rather make a boatanchor than buy one. Actually, I've been making some mild steel enclosures to build skill for my eventual 50-lb radio.

I'm wanting something more capable than a one-tube oscillator-amplifier. At very least, a MOPA transmitter. I'm also not going to buy FT-243 crystals (too rare and too constricting). I'm either going to figure out a VFO, or I'm going to drive the oscillator stage with a DDS generator. At very least, I'll buy some QRP crystals in the HC-49 case, 3D print or scroll-saw some cases, and build some up that way. If I were using smaller crystals, I'd limit the oscillator stage to 45-75 volts, meaning the crystal heating should be low.

Right now I'm finishing up a 6SN7 twin plex receiver. It will do until I can make some kind of superheterodyne rig. A full-blown phone transceiver might be a bit much for working in tubes. I'm not sure what I want to do but I get very little time to build, let alone operate, these days.

Ed AE7TE

On Fri, Nov 8, 2019 at 9:22 PM Leland L. Bahr <w5drc@...> wrote:

Ed,

If you want to do more things with tubes you have lots of choices but may I suggest building a true clone of the PARASET, or Philmore NT-200 Novice transmitter.? These won't be fast or cheap if you want a true clone but they are fun to build and use.? Besides they hold lots of history.? There is a lot of support for the PARASET .? The NT-200 puts out a very usable signal.? Both for the most part can be reproduced with parts after doing some scrounging.? Refurbishing a transmitter such as a Heathkit DX-60 can be interesting and fun and actually cost you less then doing one of the two above suggestions.? Here you would replace poor tubes, replace out of spec resistors and caps such as tubular paper ones as well as the electrolytic capacitors.? Then clean the radio, controls and switches.? Sometimes repaint transformers and covers too.?

Lee, w0vt?

On 11/8/2019 10:22 PM, Jon Edwards wrote:
Sent some pictures of the Ugly Weekender Transceiver I built in 2014. I'd like to have more projects to send but I have no photos of them (for some damn reason). I want to do more things with tubes.

Ed AE7TE


On Thu, Nov 7, 2019 at 10:28 PM wb6ogd <garywinblad@...> wrote:
Working now, thanks!

Join [email protected] to automatically receive all group messages.