HG-10B questions

[TChesek@Epix.Net]

Garey Barrell got my brain reset with his suggestions. I found that pin 6 of
0B2 was tied to ground instead of pin 7. I corrected the wiring error and
now get +107v. The previous owner used this VFO with an HW-16. I wonder what
his "quality" of life was. Pin 7 NEVER had solder on the lug so this has
been this way since being built. Thanks!

Tom k3tvc

----- Original Message ----- 
From: "Garey Barrell" <k4oah at MINDSPRING.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Monday, February 28, 2005 2:01 PM
Subject: Re: [HEATH-TEMPE] HG-10B questions


Tom -

If you are measuring 174V on pin 5 of the 0B2, it's either defective or
miswired!   Pine 2, 4 and 7 should be 0V, and Pins 1 and 5 should be
108V or very close.  The 0B2 should be illuminated key up, and dim only
slightly key down.

73, Garey - K4OAH
Atlanta

Drake C-Line Service Manual
<http://hr99.home.mindspring.com/R-4C_Servicez/>



TChesek at Epix.Net wrote:

>While trying to operate this past weekend's AM QSO party a station told me
that it sounded like my signal was "FM"ing. I notice that when I spot this
VFO I get noise in my receiver mainly when spotting but also get some noise
without turning the control. It sounds as if I'm turning a noisy pot rather
than a variable cap. I am using a DX-60A with this unit. The DX-60A is
providing +347v to the VFO. R11 in the VFO is to be 10K and reads 10.6k
which is within tolerance but it is only dropping the +347v to about +174v.
The schematic calls for +108v at pin 5 of regulator 0B2. I swapped the 0B2
with a known good one and the voltage is more stable (I noticed the 0B2
would flash about 2 seconds after every transmit-the replacement does not do
this) but it is still in the +174v range. The original 0B2, replacement and
osc tubes check good in my Allied tube tester. Is my hv too hot at +174v?
Can someone measure theirs and tell me what they get?
>
>73 & thanks,
>
>Tom k3tvc
>
>

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/HEATH.html

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/HEATH.html