Re: Which signal generator?
The TF2008 has a spare output to drive a digital frequency counter, which you may find convenient. It also includes a reasonable audio signal generator as a source for modulation, so you can vary both the amount of modulation applied, and its frequency. There are also audio output terminals.
Without a counter you still have accurate markers from a crystal oscillator to check your tuning scale against. If you use the TF2008 as a sweeper with an oscilloscope, you can use the second channel of the scope to show marker pips to give you landmarks for frequency.
It's a full lab grade beastie and should do just about anything you want.
The tuning is clever, one range tunes upwards left to right , the next tunes upwards right to left, and so on. So if you're working close to the edge of one band, you don't keep having to wind the pointer from one end to the other. Cunning, huh!
That attenuator is a 75 Ohm one for TV systems and only goes down to 5MHz.
Proper 50 Ohm general purpose ones turn up at radio rallies. Mini-Circuits sell new ones, if you're feeling flush. Otherwise have a chat with Stewart of Reading and see if Wayne has anything in stock.
A straight fixed 20dB attenuator is three resistors in a box. A blocking capacitor is just that, in a box. Boxes with RF connectors seem to be rather expensive for what they are.
Junk stalls at amateur radio rallies are good areas to search.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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