Harry's Homebrew Homepages
Harry Lythall

Updated 06th May 2017

Welcome to Harry's Homebrew Homepages; a resource for radio, hamradio and electronics in general.

This site is a copy of www.sm0vpo.com. 16,000 pdf datasheets are to be found at www.sm0vpo.com but there is not sufficient space on this server. www.sm0vpo.com will be updated regularly, but I will keep this site updated from time to time.

If you have any technical questions, then please visit my
messageboard/forum at http://sm0vpo.forumstopic.com/.

(Opens in a new window)

HHH are now hosted on a Raspberry Pi, beside my bed. I also have a mirror at sm0vpo.altervista.com.


Most recent projects are:
20 metre frame antenna (small :-)
GDO revisited (GDO-2)
No to Zeners & regulators
78L05 Push-Pull Amplifier (AF & RF)
78L05 Regulators in Use & Misuse
HF marker / generator

This week I had the pleasure to meet Paul Craddock. Paul is a former radio ham and has taught the RAE to students. His has a homepage at www.re-enactment.com, whic has nothing at all to do with radio. BUT on his site a found links to obsolete electronic component supplier(s): no component is obsolete, just harder to find.

Searching for schematics? Circuit Diagram - Schematics is the language of electronics. It provides a concise and comprehensive diagrammatic description of a circuit. www.schematics.com allows users to connect and share designs and ideas in a like-minded community.

Did you know that I have written a book? "How to please a woman in bed". Nothing to do with sex - I suggest a man should get up early on Sunday morning, make breakfast and serve it in bed. Believe me, it is a lovely romantic start to any Sunday, and can give a massive kick to any relationship.

There are several links:
My book on Amazon
My book on Adlibris (SWE)

Paperback: ISBN 9781910394717
Hardback: ISBN 9781910394724

Jag ha ett antal här i Sverige jag ka skicka för SEK 110:- inklusiv porto. Maila mig "harry.lythall(at)sm0vpo.com"

Anyway, I hope you have fun with my homepages. Very best regards from Harry Lythall - SM0VPO, (Märsta), Sweden.

Site Summary

Homebrew Projects are located at:

If my server crashes then there is an alternative at:

Download files are located at:

Visitors Circuits are located at:

About 16,000 PDF datasheets are located at:

= Photograph illustrations included with the project.
= I have recently updated this project (Obvious, really!!!)
= Recently added (no timeframe - I'm quite informal)
= Not new (but I want it to be noticed by someone)
= The picture file is missing - please let me know.

Here you can e-mail Harry, but if it is a technical question then please be so kind and use the MessageBoard. Thank you.


During 2005 I had 202,000 visitors
During 2006 I had 182,000 visitors
During 2007 I had 166,500 visitors
During 2008 I had 279,000 visitors
During 2009 I had 210,000 visitors
During 2010 I had 641,193 visitors
During 2011 I had 959,762 visitors
During 2012 I had 2,800,000 visitors*
During 2013 I had 1,671,882 visitors*
During 2014 I had 2,140,969 visitors
During 2015 I had 2,054,169 visitors
During 2016 I had 2,313,061 visitors

(* = estimated from fragmented LOG files)

2015 and 2016 is the total of the two sites www.sm0vpo.com and sm0vpo.altervista.com.

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