12-03-2014, 05:48 PM
That Avo 'Wide Range Signal Generator' was a gift at £12.50 - the valves inside it are worth that! The full manual is on the forum here:
http://golbornevintageradio.co.uk/forum/showthread.php?tid=2773&highlight=AVO+Wide+Range+Signal+Generator
They often come minus the output probe but one is easily made in a small can from the values of components shown on the circuit (200pF & 400pF caps, a 400 Ohm resistor and a 20uH choke).
As to the TECH TE20D, it's a more modern piece of kit (1970s on) - I've owned two of them and I had a not very good copy of the manual - the only one to be found on t'internet, so I cleaned it up and posted it on this forum (or rather Joe did!). It can be found here:
http://golbornevintageradio.co.uk/forum/...p?aid=9581
TE20Ds sometimes fetch quite high prices - other times not so, as with the AVO. Well worth £25.00. The one at the listing looks in very good condition.
http://golbornevintageradio.co.uk/forum/showthread.php?tid=2773&highlight=AVO+Wide+Range+Signal+Generator
They often come minus the output probe but one is easily made in a small can from the values of components shown on the circuit (200pF & 400pF caps, a 400 Ohm resistor and a 20uH choke).
As to the TECH TE20D, it's a more modern piece of kit (1970s on) - I've owned two of them and I had a not very good copy of the manual - the only one to be found on t'internet, so I cleaned it up and posted it on this forum (or rather Joe did!). It can be found here:
http://golbornevintageradio.co.uk/forum/...p?aid=9581
TE20Ds sometimes fetch quite high prices - other times not so, as with the AVO. Well worth £25.00. The one at the listing looks in very good condition.
