FS [UK]: TTi power supply and ISO-Tech scope - Page 1
Forum section: electronics / general

author: giosif
author_rank: Frequent Contributor
timestamp: June 22, 2020, 08:08:28 pm
content: Hi,I need to part with more of my equipment, so here goes:1. TTi EL302D power supply -£65(the supply works, but it has the terminal overlay plastic a bit warped)2. ISO-Tech ISR 635 analog oscilloscope -£35(I will include a Thandar TG 102 function generator with this scope - it works, although the multiplier and attenuator switches are a bit fiddly and probably need cleaning)There's one catch, though: due to the weight of the power supply and the CRT of the scope, these are collection only (RG19 area).If you are taking both, I'm offering them for£100£90.

author: giosif
author_rank: Frequent Contributor
timestamp: June 27, 2020, 09:06:19 am
content: Lowering price.

author: chevybeef
author_rank: Contributor
timestamp: July 19, 2020, 09:59:30 am
content: Tempted.

author: giosif
author_rank: Frequent Contributor
timestamp: July 19, 2020, 10:55:26 am
content: They're still available.

author: chevybeef
author_rank: Contributor
timestamp: July 19, 2020, 11:06:07 am
content: In another post you have a TG315 listed, is that also still available?

author: giosif
author_rank: Frequent Contributor
timestamp: July 19, 2020, 11:19:32 am
content: Yes, that too is available.

author: chevybeef
author_rank: Contributor
timestamp: July 19, 2020, 03:20:43 pm
content: And the Fluke 8840A?

author: giosif
author_rank: Frequent Contributor
timestamp: July 19, 2020, 04:03:22 pm
content: Haha... You are building a list.Yes, the 8840A is also available.

author: chevybeef
author_rank: Contributor
timestamp: July 19, 2020, 05:03:43 pm
content: Haha... The wish list is long.The drive isn't too bad from PO22.What leads/probes, if any, come with the:ISO-Tech + TG315 + 8840A?

author: giosif
author_rank: Frequent Contributor
timestamp: July 19, 2020, 07:55:21 pm
content: I wasn't planning to include any leads/probes but, if you are in desperate need, I can add one scope probe and one pair of meter leads.But don't expect anything great (i.e. just enough to allow one get by).Depending on how long your wish list is and what your budget can "endure", I also have an Oki/Metcal PS-900 soldering station with extra tips I intended to put back on sale (old forum entry for it here -https://www.eevblog.com/forum/buysellwanted/(fs-uk)-okimetcal-ps-900-soldering-station-with-iron-tips/msg1865451/).

author: chevybeef
author_rank: Contributor
timestamp: July 20, 2020, 06:52:02 pm
content: I would like to put this offer on the table:For the EL302D, ISO-Tech scope (no TG102, no probes) and the TG315.£110

author: giosif
author_rank: Frequent Contributor
timestamp: August 18, 2020, 05:48:14 pm
content: Just to bump this and mention these items are still available.They were sold initially, but got returned, apparently due to some issues:1. PSU is making noise when on.2. Scope is off on the time scale.Now, I've checked both issues and:1. For the noise, it is true you can hear a humming noise when the PSU is loaded, but I would have thought this is true for any linear power supply (it's certainly the case with another TTi linear PSU I have).Also, when the supply is idle, I can hear the hum only if I stick my ears really close to the PSU.Just to make more "scientific" measurements, I used the Spectroid app on my Android phone and placed the microphone of the phone as close to the top part of the PSU as possible and, when idle, I could see a 100 Hz signal which never got above -60 dB.When fully loaded, interestingly, that 100 Hz signal remained the same in terms of amplitude (if not somewhat lower) but another, wider signal showed up at around 4,750 Hz.And, while this second signal was even lower in amplitude (about -70 dB max), it was somehow more noticeable to my hearing.In any case, I will let any prospective buyers judge for themselves how loud the above sounds are and if they can live with them.2. For the time scale on the scope, I tested with a 50,000 Hz square signal on both inputs and the trace was spot on on the horizontal axis (while I was at it, I also checked amplitude and it was also fine).

author: giosif
author_rank: Frequent Contributor
timestamp: August 22, 2020, 01:18:03 pm
content: The power supply is now sold.