2023 VHF Low Band Logs

devicelab · Mar 11, 2022

Nah the one I'm picking up is local. Sounds like a woman in her 60s with an older cordless -- obviously. I think they stop selling 40mhz models back in the late 90s or early 2000s. I vaguely remember getting my new 2.4ghz V-Tech cordless back in 1999.

rescuecomm · Mar 11, 2022

My Alinco AL-06 6 meter mobile radio parked in the driveway picked up a 49.860 signal from a baby monitor sited in a chicken house. My Radio Shack PRO-197 scanner inside the house was unable to detect anything on the same frequency. Don't hear anything now, so the chicken house must be empty now.

techman210 · Mar 11, 2022

I don’t think cordless phones on 43 MHz were ever allowed in the USA.

I would suspect an illegally imported radio with a external antenna.

radioman2008 · Mar 11, 2022

Its great to see all the lowband entries, wish i was into this more back in the 90s
I have a 6 meter vertical connected to either my SDS100 or a 436HP

when I worked at Radio shack in the early to late 90s i saw several transitions of cordless phone bands.
by 1994-1995 the 10 channels on low band were crowded in some areas, so there were extra channels allocated, i think they were sold as 25 channel low band cordless phones.

heres what was listed in a wiki that backs up what i remember...

Cordless telephone - Wikipedia

43–50 MHz cordless phones had a large installed base by the early 1990s, and featured shorter flexible antennas and automatic channel selection. Due to their popularity, an overcrowding of the band led to an allocation of additional frequencies; thus manufacturers were able to sell models with 25 channels instead of just 10 channels. Although less susceptible to interference than previous AM units, these models are no longer in production and are considered obsolete because their frequencies are easily heard on practically any radio scanner. Advanced models began to use voice inversion as a basic form of scrambling to help limit unauthorized eavesdropping.[8] These phones share the 49.8 MHz band (49.830 - 49.890) with some wireless baby monitors.

43–50 MHz (Base: 43.72–46.97 MHz, Handset: 48.76–49.99 MHz, FM) Allocated in December 1983, and approved for use in mid-1984 for 10 channels. 15 additional channels allocated April 5, 1995.[6]

heres another site
Cordless Telephone Frequencies (fordyce.org)

RFI-EMI-GUY · Mar 12, 2022

techman210 said:
I don’t think cordless phones on 43 MHz were ever allowed in the USA.

I would suspect an illegally imported radio with a external antenna.

They were plentiful in that band for quite a while. I am sure many still are in service.

techman210 · Mar 12, 2022

I stand corrected!

I do remember there was one company in Northern California that made modified cordless phone units to serve “unserved areas” with external antennas.

devicelab · Mar 12, 2022

radioman2008 said:
when I worked at Radio shack in the early to late 90s i saw several transitions of cordless phone bands. By 1994-1995 the 10 channels on low band were crowded in some areas, so there were extra channels allocated, i think they were sold as 25 channel low band cordless phones.

Yes, there were cordless phones all over. Namely 43/49 megs, 900 megs, and then they moved to 2.4/5.8 gigs. The biggest scam was the 2.4 gig phones because if you turned on the microwave nearby... poof -- instant jamming device.

p1879 · Mar 12, 2022

Some early cordless phones had a 1700 khz base frequency and 49 mhz handset, if i recall correctly. My old Icom R-71 could her base units miles away after a heavy rain on the base frequency.

ecps92 · Mar 13, 2022

The US Cordless was a mix of
49/46 and 1.xx just above the AM BCB

techman210 said:
I don’t think cordless phones on 43 MHz were ever allowed in the USA.

I would suspect an illegally imported radio with a external antenna.

GMB951 · Mar 13, 2022

Scanning-NWA said:
Log for 2022/01/15
N.W. Arkansas
Uniden BCT15X with Comet GP-15 Tri-Band Antenna

Momentary Military skip heard in the afternoon hours:
38.90 MHz Range Control (Medivac in the air overhead)
46.75 MHz Range Control

These are both used for Fort Bragg Range Control,North Carolina

AM909 · Mar 17, 2022

Another couple of sources for VHF lowband (and 1.7 MHz) cordless freqs:

empireco · Mar 19, 2022

I believe the 46 MHz base units put about 10 milliWatts to the antenna. Probably not enough to skip under any conditions.

devicelab · Mar 23, 2022

Date of Recording	Freq	Tone	Skip?	User	Notes
March 22, 2022	31.70	150		UNK MIL	"So we're going to be good staying in this lane then?"
	32.70	150		UNK MIL [COUGAR]	COUGAR HUMV convoy
	34.60	150		UNK MIL	"…report power…"
March 21, 2022	34.60	150		UNK MIL	"75 Roger. Report power…"
	47.96	103.5		City of Seattle	"Figure out where to set you up in a minute…" WQLS863
March 17, 2022	30.72	151.4		UNK	Two women talking about a monitor… school bus? WPMY658 (Spokane) ?
	32.70	150		JBLM-USARMY
	33.30	CSQ	YES	UNK	Two males talking
	44.46	CSQ		Cordless Phone BASE CH
	45.20	127.3		WA EOC CEMNET
	45.88	156.7	YES	UNK	Male voice
	48.26	CSQ		Grays Harbor County PUD
	48.40	103.5		UNK	"I don't need jerk over here…"
	48.66	110.9		Green Diamond Resource Company
March 15, 2022	32.70	150		JBLM-USARMY	"RONIN44. go ahead and send engine temperature… it's currently at 207." REF STRYKER
	43.18	CSQ		UNK	"…I spilt some in my chute…"
	44.46	CSQ		Cordless Phone BASE CH
March 14, 2022	44.40	CSQ		Cordless Phone BASE CH 13
	47.92	107.2		Peninsula Light Company Inc	KOI759

3/15 - 32.7 Recording: https://www.dropbox.com/s/0np7l1gjtnryjr4/327i.mp3?raw=1
3/22 - 32.7 Recording: https://www.dropbox.com/s/gjqyyaziyuj6xmz/327l.mp3?raw=1

3/21, 3/22 - 34.6 Recordings:
https://www.dropbox.com/s/f8b75stl66s2lk4/346a.mp3?raw=1

https://www.dropbox.com/s/xdw8c1nwtr7wkqx/346b.mp3?raw=1

kkn50 · Mar 24, 2022

Recent Logs
San Antonio TX
BCD996XT Scanner with 10 meter dipole

FREQ	SQ	CALL	DESCRIPTION
25.0000	AM	WWV	Ft Collins CO
32.1800	77.0		Taxi, Alajuela, Costa Rica
32.9400	141.3		Spanish - Sounds like taxi dispatch - in the past a repeater on this freq has transmitted US Fire Department comms

kkn50 · Mar 26, 2022

Logs: 2022/03/26
San Antonio TX
BCD996XT Scanner with 10 meter dipole

FREQ	SQ	CALL	DESCRIPTION
32.1800	77.0		Taxi, Alajuela, Costa Rica
32.9400	141.3		Taxi dispatch in Spanish - in the past a repeater on this freq has transmitted US Fire Department comms

Audio files

32.1800 - Google Drive

drive.google.com

32.9400 - Google Drive

drive.google.com

kkn50 · Mar 27, 2022

Logs: 2022/03/27
San Antonio TX
BCD996XT Scanner with 10 meter dipole

FREQ	SQ	CALL	DESCRIPTION
25.0000	AM	WWV	Ft Collins CO
32.1800	141.3		Taxi, Alajuela, Costa Rica
32.9400	141.3		Taxi dispatch in Spanish - in the past a repeater on this freq has transmitted US Fire Department comms
36.8000	150.0		US MIL - NG helos assisting with a wildfire near San Antonio. Also on 122.925 'Air Tac'.
39.3400	162.2	WPHM449	CA HP
44.9400	186.2		CA HP
45.5000	192.8	WQA721	CA HP
49.5400	67.0		Pike Electric Ch 2 <nationwide contractors>

Audio Files

32.9400 - Google Drive

drive.google.com

45.5000 - Google Drive

drive.google.com

kkn50 · Mar 28, 2022

Logs: 2022/03/28
San Antonio TX
BCD996XT Scanner with 10 meter dipole

FREQ	SQ	DESCRIPTION
32.0500	150.0	US MIL - Raptor Net
32.1800	141.3	Taxi, Alajuela, Costa Rica
32.1800	77.0	Taxi, Alajuela, Costa Rica
32.9400	141.3	Taxi dispatch in Spanish - in the past a repeater on this freq has transmitted US Fire Department comms
36.8000	150.0	US MIL - Helos
43.5200	77.0	Ingram Readymix, San Antonio TX

Audio Files

kkn50 · Apr 4, 2022

Recent Logs
San Antonio TX
BCD996XT Scanner with 10 meter dipole

FREQ	SQ	CALL	DESCRIPTION
30.0250	150.0		US MIL
30.3000	150.0		US MIL - Helos
32.1800	141.3		Taxi, Alajuela, Costa Rica
32.9400	141.3		Taxi dispatch in Spanish - in the past a repeater on this freq has transmitted US Fire Department comms
34.0400	127.3		Taxi - Turrialba, Costa Rica
34.2000	150.0		US MIL - Range Control, Camp Bullis TX being called by Rebel 36, Bullis did not reply. Is this still a valid frequency for Camp Bullis? Have not heard Range Control in several months.
36.8000	150.0		US MIL - Helos
36.9000	150.0		US MIL - Martindale Army Heliport Ops, San Antonio TX
39.3400	162.2	WPHM449	CA HP
39.4000	162.2	WPHM445	CA HP
40.0000	150.0		US MIL - Rebel 36
43.2800	77.0		Ingram Readymix, San Antonio TX
44.9400	186.2		CA HP
45.0200	192.8	KCQ240	CA HP
49.5800	67.0		Pike Electric Ch 3 <nationwide contractors>

kkn50 · Apr 5, 2022

Unidentified language on 30.5500 and 31.1000 today. Any ideas?

30_5500CSQ 20220405.mp3

drive.google.com

31_1000CSQ 20220405.wav

drive.google.com

kkn50 · Apr 5, 2022

Logs: 2022/04/05
San Antonio TX
BCD996XT Scanner with 10 meter dipole

FREQ	SQ	DESCRIPTION
30.5500	CSQ	Unidentified language
31.1000	CSQ	Unidentified language
32.1800	141.3	Taxi, Alajuela, Costa Rica
32.1800	77.0	Taxi, Alajuela, Costa Rica
32.9400	141.3	Taxi dispatch in Spanish - received at the same time as Costa Rica
36.9000	150.0	US MIL - Martindale Army Heliport Ops, San Antonio TX

2023 VHF Low Band Logs

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