Thanks guys. If I were going to design it, that's the one I would have chosen, given the signal level. On Sep 3, 2010, at 4:45 AM, volt-nuts-request@febo.com wrote: > Message: 8 > Date: Fri, 03 Sep 2010 10:30:50 +1200 > From: Bruce Griffiths <bruce.griffiths@xtra.co.nz> > Subject: Re: [volt-nuts] Feedback lamp in Heath Sine-Square Generators > To: Discussion of precise voltage measurement <volt-nuts@febo.com> > Message-ID: <4C80259A.3060500@xtra.co.nz> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Bruce Griffiths wrote: >> Dick Moore wrote: >>> Anybody know the type of lamp used for L1, the feedback AGC element >>> in the Heath IG-18, IG-5218, SG-5218 Audio Sine-Square Generators? >>> >>> Best, >>> Dick Moore >>> _______________________________________________ >> The IG18, IG5218 circuits have no lamp for AGC. >> >> Bruce >> >> > Oops just spotted the lamp. > > Type 327?? > > Bruce > > > ------------------------------ > > Message: 10 > Date: Fri, 3 Sep 2010 11:45:07 +0000 (GMT) > From: Robert Atkinson <robert8rpi@yahoo.co.uk> > Subject: Re: [volt-nuts] Feedback lamp in Heath Sine-Square Generators > To: Discussion of precise voltage measurement <volt-nuts@febo.com> > Message-ID: <403436.51101.qm@web27106.mail.ukl.yahoo.com> > Content-Type: text/plain; charset=iso-8859-1 > > GE 327, > Common aircraft and industrial 28V 40mA midget flange. > ? > Robert G8RPI.