Modifications for the Kenwood
TH-27

19-07-1998 Keyboard Mods to access AM
detector and change band
A full review of the Kenwood TH27a ran
in the March Issue 1991 of CQ
- Press the ENT key once or twice to place HT in VFO mode and in the 2m band
- Depress the F key for 2 secs. (Note flashing F in lower right corner)
- Release F key and press MHz key
- HT will shift to 118.00 MHz and activate the am detector
- Store any freqs from 118-138 into memory
- Hit F key till it flashes
- Hit MHz key
- Your back on 139-170MHz with FM detector
This is a very
sophisticated HT and now a great bargin
73-AB4VJ

21-04-2000 TH-27A/E Low TX
power
Author: Kenwood
Communication, inc.
Service Bulletin no. 991 (11 May 1992)
We have noticed some variation in the output power provided by Toshiba
S-AV22A power modules with a production code of "11". Modules with this
production code might exhibit low or no transmitter output power. This procedure
will correct this problem.
Parts required:
0.01 µF axial lead capacitor, (C91-0769-05)
Procedure:
- Remove chip capacitor C17 and C18 from the TX-RX unit
(X57-3640-11).
- Install the new axial lead capacitor as shown in the accompanying diagram.
Note: Deleting C17 and C18 alone will not correct this symptom. The
new C18 will be used to stabilize circuit performance. Deleting C17 alone will
not cure the symptom.
Time required for this modification is 30 minutes or less.
