Create accountLogin

Recent searches

No recent searches

Search options

Only available when logged in.
shakedown.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
A community for live music fans with roots in the jam scene. Shakedown Social is run by a team of volunteers (led by @clifff and @sethadam1) and funded by donations.

Administered by:

Server stats:

275
active users

shakedown.social: AboutStatusProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.3.4

#telephoneexchange

0 posts0 participants0 posts today
lpbkdotnet<p>Ok <a href="https://mstdn.social/tags/vintageElectronics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>vintageElectronics</span></a> nerds! tell me about these things…</p><p>The “MR” designation denotes some kind of diode (it stands for Metal Rectifier, a notation hangover from before silicon/germanium diodes) and they’re obviously arranged as full bridge rectifiers</p><p>They’re in a PSU made for the British Post Office in 1972</p><p>The brown stripe seems to denote the + end, but what does the other stripe mean?</p><p><a href="https://mstdn.social/tags/Electronics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Electronics</span></a> <a href="https://mstdn.social/tags/TelephoneExchange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TelephoneExchange</span></a> <a href="https://mstdn.social/tags/Telephone" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Telephone</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>phone</span></a> <a href="https://mstdn.social/tags/phoneExchange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>phoneExchange</span></a> <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>strowger</span></a> <a href="https://mstdn.social/tags/hamRadio" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hamRadio</span></a> <a href="https://mstdn.social/tags/AmateurRadio" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AmateurRadio</span></a></p>
lpbkdotnet<p>Welcome to the <a href="https://mstdn.social/tags/TelephoneExchange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TelephoneExchange</span></a> shed my new beepyboopy friend!</p><p>This is a “GPO Modem 2B” - a <a href="https://mstdn.social/tags/dialup" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>dialup</span></a> <a href="https://mstdn.social/tags/modem" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>modem</span></a>… phone line in, RS232 out at a whopping 300bps!</p><p>It’s all discrete components (no ICs here!) and beautifully built with all the diodes/resistors mounted on little plastic carriers.</p><p>The modulator, demodulator etc are on separate, pull-out cards</p><p>It’s a gorgeous chunk of engineering, that I’ll be carefully powering up over the next few weeks!</p><p>Thanks for the swap <span class="h-card" translate="no"><a href="https://mastodon.social/@anachrocomputer" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>anachrocomputer</span></a></span></p>
This Is My Glasgow<p>I love the granduer of this Neo-Baroque style 1930s telephone exchange in the Tradeston area of Glasgow. I'm sure there are many uses it could be put to, but instead it's been left empty and decaying for years.</p><p><a href="https://mastodon.scot/tags/glasgow" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>glasgow</span></a> <a href="https://mastodon.scot/tags/architecture" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>architecture</span></a> <a href="https://mastodon.scot/tags/glasgowbuildings" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>glasgowbuildings</span></a> <a href="https://mastodon.scot/tags/telephoneexchange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>telephoneexchange</span></a> <a href="https://mastodon.scot/tags/tradeston" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tradeston</span></a> <a href="https://mastodon.scot/tags/architecturephotography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>architecturephotography</span></a></p>
This Is My Glasgow<p>The former Tradeston Telephone Exchange. Designed in a Neo-Baroque style, it was built around 1935. Due to changes in telecommunications technology, it became vacant in the 1970s, and despite a number of attempts to rejuvinate it over the years, it has lain pretty much abandoned and decaying ever since.</p><p><a href="https://mastodon.scot/tags/glasgow" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>glasgow</span></a> <a href="https://mastodon.scot/tags/architecture" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>architecture</span></a> <a href="https://mastodon.scot/tags/glasgowbuildings" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>glasgowbuildings</span></a> <a href="https://mastodon.scot/tags/telephoneexchange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>telephoneexchange</span></a> <a href="https://mastodon.scot/tags/tradeston" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tradeston</span></a></p>
lpbkdotnet<p>Thought I’d give the <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>strowger</span></a> <a href="https://mstdn.social/tags/telephoneExchange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>telephoneExchange</span></a> bit of a workout this evening.</p><p>I’ll be running it in a lot over the next couple of months to give any faults time to show themselves before <a href="https://mstdn.social/tags/emfcamp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>emfcamp</span></a></p><p>Tonight though, I ran 100 calls through it (25 per selector) and had 0 failures!</p><p>That’s not bad considering I haven’t run it over the winter!</p><p><a href="https://mstdn.social/tags/telephone" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>telephone</span></a> <a href="https://mstdn.social/tags/phone" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>phone</span></a> <a href="https://mstdn.social/tags/electroMechanical" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>electroMechanical</span></a> <a href="https://mstdn.social/tags/relays" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>relays</span></a></p>
lpbkdotnet<p>Yay!</p><p>I’m taking a <a href="https://mstdn.social/tags/strowger" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>strowger</span></a> <a href="https://mstdn.social/tags/telephoneExchange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>telephoneExchange</span></a> to <a href="https://mstdn.social/tags/emf2024" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>emf2024</span></a> </p><p>Now I just have to work out how to get it out of the shed!</p><p><a href="https://mstdn.social/tags/emf" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>emf</span></a> <a href="https://mstdn.social/tags/emfcamp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>emfcamp</span></a> <a href="https://mstdn.social/tags/emfcamp2024" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>emfcamp2024</span></a></p>
IT News<p>A Complete Exchange From Scratch For Your Rotary Dial Phones - Such has been the success of the mobile phone that in many places they have remove... - <a href="https://hackaday.com/2024/01/29/a-complete-exchange-from-scratch-for-your-rotary-dial-phones/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2024/01/29/a-comp</span><span class="invisible">lete-exchange-from-scratch-for-your-rotary-dial-phones/</span></a> <a href="https://schleuss.online/tags/telephoneexchange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>telephoneexchange</span></a> <a href="https://schleuss.online/tags/phonehacks" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>phonehacks</span></a> <a href="https://schleuss.online/tags/cons" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cons</span></a> <a href="https://schleuss.online/tags/pots" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>pots</span></a> <a href="https://schleuss.online/tags/slic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>slic</span></a></p>
ExploreLive feeds
About