According to 1993's W.R.T.H. Equipment Buyers Guide, both Lowes' HF-125 &
HF-225 generate synthesizer noise between 30 & 70 khz. The HF-125 also
generates 1 microvolt "birdies" @ 143, 1500, 1945, 3141, 4901, 9891, 10793,
11954, 13935, 14082, 14482, 14505, 14847, 18749, 21587, 23988, 28784, & 29695
khz. Six birdies were found on the HF-225, but their frequencies weren't
notated. "More expensive sets like Yaesu's FRG-8800 & ICOM's R-71 have around
the same number of birdies too". Both units have memory capacity for 30
frequencies, & dual-conversion topology @ 45mhz & 445khz. Narrow Band F.M. &
Synchrophase Detection were add-on options on both receivers, as well as a
keypad for direct frequency input. Although the HF-125's "synchronous detection
does perform, it doesn't lock onto very weak signals; & when this mode is used,
the audio sounds less pleasant. Unlike the cheaper Sony ICF-2001D/2010, which
also offers synchronous detection, you cannot select between upper or lower
sideband. We would rate the value of the synchronous detector as only
FAIR/POOR. The sync on the new Lowe HF-150 is much better". Sync fidelity is
better on the HF-225, but still isn't selectable sideband & thus rated only
FAIR. Dynamic range on the HF-150 is 78db, & 88db on the HF-225. WRTH said both
units are nice no-frills performers, but bear in mind the HF-150 has the better
sync detector.