The following is a complete list of all articles I have managed to find relating to the Huff-Puff method of stabilising a VFO for use in amateur radio transmitters and receivers. These documents are in Adobe Acrobat (PDF) format. If you do not have Adobe Acrobat installed, you can install it here. If anyone has an article not in my collection, please email it to me!

IMPORTANT NOTE: I have tried to keep the file sizes as small as possible. You will need to experiment with the viewing scale in Adobe Acrobat to obtain the most readable image. Often using the "Actual Size" setting, equivalent to 100% zoom, is best. Printing the files is another alternative, which should always produce good-looking pages.

	Thanks to the Radio Society of Great Britain (RSGB) for permission to reproduce articles from Radcom, the society's monthly journal.
	Thanks to the American Radio Relay League (ARRL) for permission to reproduce articles from QEX, the Forum for Communications Experimenters.
	Thanks to Vereniging voor Experimenteel Radio Onderzoek Nederland (VERON) for permission to reproduce the original PA0KSB article from April 1973 Electron.

Permission to reproduce the articles from Elektor Electronics was unfortunately NOT GRANTED. If you require any further information on these articles, please email me direct. Fortunately you can also read about Eamon Skelton's EI9GQ's VFO stabiliser project on his website, complete with downloadable PIC assembly code. Ham Radio magazine is no longer in print. I made some effort to try to track down the owner of the Ham Radio copyright, which I believe to be QST (ARRL), however to date I have not received a reply.

Thanks to David White W5NY for sending me the following articles: Ham Radio, Nov '74 "Tuned VLF Converter"; Ham Radio, Jun '79 "AFC Circuit for VFO's"; Ham Radio '87 "Better frequency stability for the Drake TR7". The article titled "Tuned VLF Converter" does not relate to Huff & Puff stabilisers; it is included here because it uses a variable magnetic field to tune a VFO inductor, as David W5NY and I have done in our Huff & Puff stabilisers.

Thanks to Gert PA3CRC for sending me the original article by Klaas PA3KSB in Electron, the journal of the Dutch amateur radio society Veron.

Many of the articles come from Pat Hawker's excellent "Technical Topics" column from RadCom. Pat G3VA became a silent key in February 2013 aged 90. He wrote his Tech Topics column every month for 50 years starting in 1958. An amazing achievement and an inspiration to all homebrewers. The Tech Topics articles are marked with publication "RadCom TT" in the list below. All of these articles are written by Pat himself, but make frequent reference to diagrams and letters he has received. In these cases I have listed the original source as the author, not Pat. To keep the file sizes as small as possible, I have edited out surrounding articles (interesting though they often are).