My neighbor had a diathermy device from the 1930s or 1940s , and refused to power it on because of the radio interference it supposedly created. I wish I remembered more about the control panel, but I do recall it had a large tuning dial and I think the dial went up to several Mhz. It was a large wooden cabinet, art-deco style. It's been more than 40 years since I saw it, but the[image: vintage-1940s-hogan-brevatherm.jpg] photo here I found online reminds me of it.
I would also be careful about exposure to RF energy in case you decide to power it on. On Wednesday, August 12, 2020 at 10:02:40 AM UTC-7 David Pye wrote: > I wonder about shortwave therapy. My dad was a physio and had lots of > huge machines that heated the tissues with RF energy. Similar meters etc? > > David > > On Wed, 12 Aug 2020, 14:22 Alex, <[email protected]> wrote: > >> Hi, I am not sure about this being a diathermy as they are generally more >> powerful (unless this is a fairly high voltage, the mA meter would suggest >> a fairly low current). My diathermy tester presents a few hundred ohms load >> and expects around 100 watts of output... >> >> I suspect this is one of the many early electrotherapy devices - think >> tens machine - they often used salt bath type solutions and various >> ionisation / RF outputs of low power for various applications. IONO would >> suggest salt / electrolysis bath also. I have had a few later units come >> through with medical equipment surplus / scrap that are vaguely similar to >> this. >> >> That said it could be a diathermy but there was many random quackish >> machines like this over the early years. Does it have a footpedal? >> >> - Alex >> >> -- >> You received this message because you are subscribed to the Google Groups >> "neonixie-l" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/a3dc44eb-59fb-415f-8e0a-320afb7d643co%40googlegroups.com >> >> <https://groups.google.com/d/msgid/neonixie-l/a3dc44eb-59fb-415f-8e0a-320afb7d643co%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/0dd8a37f-e4be-4ee2-ad4a-e8672ef9f8cfn%40googlegroups.com.
