Hi Colin, Nothing like getting the data from the designer !! They were used in many of the first wave of digital TV transmitters and transposers. Phase noise is good (essential for DTV), and they were

Hi Colin, See photo of a fuzzy diagram of a cct it was used in. I don't have the physical pinout to hand, will dig it out later. Osc is a bit sensitive Hz/volt on the control V, but usable up to 10G w

Hi Chris, The one I have found is not the same as the one in the picture you sent me - sorry. The one I had on the rear of the old chassis is gone. Cheers David

Hi Chris, Not found them yet - hopefully not launched during a previous clearout :) Will keep looking.. Hope it is the correct one, a chance it is off an old network analyser pair. Cheers, DAvid

Hi Chris, I have some spare 141 chassis, already robbed of a few bits but you cable will be in there im sure. Cheers David

Hi Mike, JT4 is more sensitive than PI4. The transmit time is longer, so more energy sent for a given sequence. I think more folk are set up for WSJT for the multitude of modes it provides. I don't kn

Hi Robin, Doherty amps work in a less obvious way. The Carrier device could easily be running 10 times the current of the Peaking side. The two sides may be biased differently. The are moderately narr

Hi All, New LO chain built and fitted to the 10GHz part of GB3CSB to replace the original failed unit. Thanks to Mark GM4ISM and Alan GM0USI for checking all was well off air when the equipment was re

Hi All, The temporary exciter for CSB has been removed and the original repaired (and upgraded) driver now returned to service. So now back to its usual self. GPS locked, JT4 etc. With one exception,

Hi All, I have broken open another couple of Ionica base stations. Picture attached. Before I list bits on Ebay, is anyone interested in any of the contents ? PA's, Rx converter's, PSU modules(48V DC

Hi Robin, Yes. I still have some, along with Rx modules and other bits from the base station. Cheers, DAvid

Hi, A bit of topic this, but the general techniques are useful.. The trick with the duplexers is to have a good return loss at the PASS freqy, even at the expense of notch depth. 23db ret loss is a mi

Hi All, Over the last 11 days or so the temp beacon OCXO had drifted up to around +800Hz (CSB CW MARK should be 1296.985.000). About 700Hz in the first few days, then the drift slowed down. Last night

Hi Paul, I still have all sorts of Ionica base station parts available should you need them. Looks like Mike has you sorted already. Cheers, David

Hi Nick, Yes all on (all were off). Its a common exciter for all bands. Been meaning to make a backup for about 13 years now...! The backup hardware is capable of JT4 but it would have taken a few ext

Hi All, GB3CSB back on about 17:00 today using a back up exciter put together over the weekend. No GPS lock, no JT4g, no time lock. Just carrier, CW Call & QRA. Carrier is around 50S in duration. The

Hi All, Walter managed to get it working again last night, but has failed again. So although intermittent, consider it Off Air. From Walter's work, it looks like the recurrence of a previous problem,

Hi All, All GB3CSB beacons are off at the moment. I have asked Walter GM8IIH, who owns the site, if he could have a look for me to get some idea of the problem and see if there is anything he can do.

Hi Mike, try a search for "Ubiquiti Hamnet". Alternative firmware for amateur use. Your model may be one used -- should it interest you.... Cheers, David

Hi Howard, You have done the test we were all scared to try ! Did the PA survive, and if so, how long was it powered for ? I still have various Ionica bits if its bad news. Cheers, DAvid GM6BIG