I'm particularly interested in older HP test equipment, especially their signal generators. Currently I have examples of
- HP 200A audio signal generator
- HP 200B audio signal generator
- HP 200C audio signal generator
- HP 200D audio signal generator
- HP 200AB audio signal generator
- HP 200CD audio signal generator
- HP 201CR audio signal generator
- HP 202A low frequency function generator
- HP 206A audio signal generator
- HP 606A RF signal generator
- HP 650A test oscillator
- HP 651B test oscillator (sand-state)
- HP 400AB AC VTVM
- HP 400C AC VTVM
- HP 400D AC VTVM
- HP 400H AC VTVM
- HP 400E AC voltmeter (sand-state)
- HP 410B VTVM
- HP 410C VTVM (hybrid hollow- and sand-state)
- HP 411A RF millivoltmeter
- HP 412A DC VTVM
- HP 425A DC micro volt-ammeter
- HP 427A voltmeter (sand-state)
Items I'd like to add:
- HP 205AG audio generator
- EICO 369 sweep generator