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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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4th May 2018, 6:20 pm | #1 |
Hexode
Join Date: Oct 2013
Location: Peterborough, Cambridgeshire, UK.
Posts: 336
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RCS 702 80mHz frequency counter
Hi, has anybody got the schematic for the above frequency counter, I picked one up quite cheaply, having a faulty LED display, cured by cleaning the connecting pins from divider board to display.
My other problem is that any frequency above 7mHz I lose the most significant digit, I found this out during tests by injecting signal from my Marconi 2022e, I injected 14.250 and the display showed just 4.250 and again when I injected 21.050 all I got was 1.050. Just need to follow the next stage. Thanks in anticipation Snowy |
5th May 2018, 12:46 pm | #2 |
Nonode
Join Date: Jan 2010
Location: Edinburgh, UK.
Posts: 2,008
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Re: RCS 702 80mHz frequency counter
Some of the RCS frequency counters had only 5 or 6 digits and a MHz/kHz switch. The idea is that if the frequency is too high for the kHz position switch to MHz and read the most significant digits then switch back to kHz and add on the least significant ones.
Not sure if the 702 follows this pattern but my old 301 did. There seems to be nothing on the internet about RCS but I do remember it stood for Radio Component Specialists, a chain of shops from the 70s that supplied components, kits and surplus electronics. Al
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