https://golbornevintageradio.co.uk/forum/ Mon, 20 Apr 2026 03:37:26 +0000 MyBB https://golbornevintageradio.co.uk/forum/showthread.php?tid=8825 Mon, 20 Jun 2022 13:29:15 +0000 Mike Watterson]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=8825 There may be errors.
They should load OK into current Eagle and Cadsoft era Eagle (before Farnell)
They are in Zip because the Forum doesn't allow .lbr

I added the directory in Linux to my ancient free version 6.0 for Linux and tubes-radioway does seem to have Rod tubes and B7G battery valves. Another library has common USA subminiature types.

These were created long ago on XP, maybe 2006, using paid Cadsoft version for Windows, which does actually work on WINE32. But I imaged my entire XP laptop as VM using free MS tool and that loads in Vbox on Linux.

  eagleLib-valves.zip (Size: 122.27 KB / Downloads: 4) ]]> There may be errors.
They should load OK into current Eagle and Cadsoft era Eagle (before Farnell)
They are in Zip because the Forum doesn't allow .lbr

I added the directory in Linux to my ancient free version 6.0 for Linux and tubes-radioway does seem to have Rod tubes and B7G battery valves. Another library has common USA subminiature types.

These were created long ago on XP, maybe 2006, using paid Cadsoft version for Windows, which does actually work on WINE32. But I imaged my entire XP laptop as VM using free MS tool and that loads in Vbox on Linux.

  eagleLib-valves.zip (Size: 122.27 KB / Downloads: 4) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=5497 Mon, 04 Apr 2016 22:59:10 +0000 Joe]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=5497
  PE FM One-Valver.pdf (Size: 838.37 KB / Downloads: 55) ]]>
  PE FM One-Valver.pdf (Size: 838.37 KB / Downloads: 55) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=4988 Thu, 17 Sep 2015 13:45:58 +0000 Joe]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=4988
  RC ECL83 Amplifier.pdf (Size: 820.03 KB / Downloads: 32) ]]>
  RC ECL83 Amplifier.pdf (Size: 820.03 KB / Downloads: 32) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3839 Thu, 07 Nov 2013 14:24:55 +0000 Joe]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3839
  PW Miniature Power Amplifier.pdf (Size: 3.52 MB / Downloads: 28) ]]>
  PW Miniature Power Amplifier.pdf (Size: 3.52 MB / Downloads: 28) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3474 Fri, 14 Jun 2013 10:05:52 +0000 FIXITNOW]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3474
  Henelec Amp.pdf (Size: 1.46 MB / Downloads: 8) ]]>
  Henelec Amp.pdf (Size: 1.46 MB / Downloads: 8) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3473 Fri, 14 Jun 2013 10:03:53 +0000 FIXITNOW]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3473
  10+10.pdf (Size: 1.81 MB / Downloads: 8) ]]>
  10+10.pdf (Size: 1.81 MB / Downloads: 8) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3383 Tue, 14 May 2013 16:38:25 +0000 Joe]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3383
  Battery Eliminator project.pdf (Size: 3.29 MB / Downloads: 41) ]]>
  Battery Eliminator project.pdf (Size: 3.29 MB / Downloads: 41) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3303 Thu, 18 Apr 2013 12:12:14 +0000 Joe]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3303

  Three Valve Circuits.pdf (Size: 1.67 MB / Downloads: 30) ]]>

  Three Valve Circuits.pdf (Size: 1.67 MB / Downloads: 30) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3152 Mon, 25 Feb 2013 18:58:17 +0000 Yorkie]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=3152
The LM386 IC is widely used as a 500mW amp and you can buy ready-made amps based on it for about a fiver from China - very neat they are too. However, for a bit more power, the LM380 IC can give a good account of itself and can be found cheaply on e-bay. I've attached a copy of the' R.E.W' article and have also attached a cleaned-up version of the PCB artwork which I've 'Photoshopped' because that shown in the article is very poor and is unusable. (It's not to scale either).

The circuit is very simple, and could be built without resorting to a PCB, but a word of warning - the IC needs to be adequately heat sinked. This is normally achieved - as in this design - by an area of the PCB foil to which pins 3, 4 & 5, and 10,11 & 12 are soldered. There pins are connected to an internal heat sink in the IC package. It's for this reason that an IC socket ought not to be used as the heat sinking won't be as efficient.

There are LM380-based kits available cheaply on internet - I've looked at several out of curiosity, and though they invariably use a PCB, most make no adequate provision for heat sinking.

The LM380 IC also comes in an 8-pin version, which for heat sinking purposes and power handling is best avoided in preference for the 14-pin version as specified in the attached article.

Hope that might interest someone.

(Amplified PC speakers can often be found in charity shops and at car boot sales, which are useful as bench amps for test purposes and save the hassle of building one.)






  Amplifier based on LM380 IC.jpg (Size: 734.68 KB / Downloads: 23)

  LM380 AMP PCB.jpg (Size: 196.57 KB / Downloads: 17) ]]>
The LM386 IC is widely used as a 500mW amp and you can buy ready-made amps based on it for about a fiver from China - very neat they are too. However, for a bit more power, the LM380 IC can give a good account of itself and can be found cheaply on e-bay. I've attached a copy of the' R.E.W' article and have also attached a cleaned-up version of the PCB artwork which I've 'Photoshopped' because that shown in the article is very poor and is unusable. (It's not to scale either).

The circuit is very simple, and could be built without resorting to a PCB, but a word of warning - the IC needs to be adequately heat sinked. This is normally achieved - as in this design - by an area of the PCB foil to which pins 3, 4 & 5, and 10,11 & 12 are soldered. There pins are connected to an internal heat sink in the IC package. It's for this reason that an IC socket ought not to be used as the heat sinking won't be as efficient.

There are LM380-based kits available cheaply on internet - I've looked at several out of curiosity, and though they invariably use a PCB, most make no adequate provision for heat sinking.

The LM380 IC also comes in an 8-pin version, which for heat sinking purposes and power handling is best avoided in preference for the 14-pin version as specified in the attached article.

Hope that might interest someone.

(Amplified PC speakers can often be found in charity shops and at car boot sales, which are useful as bench amps for test purposes and save the hassle of building one.)






  Amplifier based on LM380 IC.jpg (Size: 734.68 KB / Downloads: 23)

  LM380 AMP PCB.jpg (Size: 196.57 KB / Downloads: 17) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=2854 Tue, 04 Dec 2012 20:04:16 +0000 Joe]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=2854
  PW807Amp.pdf (Size: 1.8 MB / Downloads: 17) ]]>
  PW807Amp.pdf (Size: 1.8 MB / Downloads: 17) ]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=2801 Mon, 26 Nov 2012 19:27:40 +0000 Joe]]> https://golbornevintageradio.co.uk/forum/showthread.php?tid=2801
  Frequency Shifter for 100-108 MHz FM Reception.PDF (Size: 65 KB / Downloads: 42) ]]>
  Frequency Shifter for 100-108 MHz FM Reception.PDF (Size: 65 KB / Downloads: 42) ]]>