For RF network cable telecom test work, a used HP signal generator can be a practical bench addition. The two units here take different approaches. The Hewlett-Packard 606A is a low-frequency benchtop generator. The HP 8654B offers higher-frequency coverage. Both are listed as used and untested, so the picking process centers on the frequency range you need and how much visible wear you are comfortable with.
Quick verdict
Choose the 606A if you want a low-frequency classic with a complete vintage package. Choose the 8654B if you need higher-frequency output and want the lower listed price. For a general RF network cable telecom test bench, the 8654B's frequency span makes it the more flexible first purchase; the 606A is the better fit for dedicated low-band work.
Comparison at a glance
| Product | Listed price | Price bar | Condition | Key differentiator |
|---|---|---|---|---|
| Hewlett-Packard 606A Signal Generator Vintage RF Test Equipment With Manual | USD 161.10 | Used | Low-frequency analog dial, two meters, and manual included | |
| HP 8654B Signal Generator 10-520 MHz Vintage RF Test Equipment | USD 116.96 | Used | Higher-frequency coverage at a lower listed price |
Where each product wins
Hewlett-Packard 606A wins for low-band bench setups. It has a large analog frequency dial, two analog meters, and a US-made chassis. The listing notes visible paint and side wear, but no major dents.
HP 8654B wins for RF work that needs extended frequency reach. The controls and connectors appear present, and the unit fits higher-frequency test work. Surface dirt, scuffs, oxidation, and a lack of accessories or packaging are trade-offs.
Product notes
Hewlett-Packard 606A Signal Generator Vintage RF Test Equipment With Manual
The manual is the 606A's main advantage. On a used instrument, the operating and service manual makes it easier to understand the dial, meters, and controls. The analog frequency dial spans 50 kHz to 65 MHz, and the two front-panel meters show modulation and DBM/volts. The enclosure shows wear on the paint and sides, but the listing says there are no major dents. The unit is described as untested, which matters for a vintage instrument. If you need a low-frequency RF source and want a complete vintage package, this 606A is the one to choose.
HP 8654B Signal Generator 10-520 MHz Vintage RF Test Equipment
The 8654B's 10-520 MHz span is the standout reason to pick it. That range covers signals well above the 606A's low-band ceiling, making it the more versatile choice for many RF network cable telecom test setups. The main controls and connectors are visible in the photos and appear present. The unit is untested, and the physical condition shows surface dirt, scuffs, oxidation, and an aged but intact leather handle. No accessories or packaging are included, so you receive the generator as pictured. For higher-frequency work, this unit offers the most useful frequency reach.
Final choice by use case
For low-frequency work, the Hewlett-Packard 606A is the recommended pick. For higher-frequency RF network cable telecom test tasks, the HP 8654B is the more practical choice. If you want one unit that can handle the widest range of signals in this listing, the 8654B is the better starting point.
