Barrie,
There ARE different tube line-ups between the HT-5 and the BC-614.
I did not know that! Will have to do some research.
From your description of the mounting for the shelf and socket for the
padder cap, there are obviously differences inside the BC-610 vs. the
HT-4.
I went to the previously suggested website. There was a photo of the RF
compartment of a BC-610 with no capacitor shelf in sight.
I'm curious as to what differences in meters there is. I have one for
filament voltage, one for tweaking the oscillator - it is multi-functional
with a function switch, and then there is the plate current meter. The
BC-614 has of course its own meter for modulation current. The BC-939 has
an RF Ammeter.
The HT4-B has five meters. From left to right they are:
Plate
Grid Current
Excitation Plate
Fil Voltage
Modulation Plate
(I believe that this meter performs the same function as the modulation
meter in the BC-614. At least they dance about in the same fashion when I
babble into the microphone)
What other differences there may be, I do not know. It would be of interest
(to me, at least) to find out.
BTW, there is a fairly decent photo of my HT4-B on the November, 1992 (I
think) cover of Electric Radio magazine. My call sign, at that time was
KF7VA. Thanks to the vanity program, I'm back to my original call from the
early 1950s.
73, Barrie, W7ALW
Bob - N0DGN
Barrie Smith wrote:
Bob:
I've got my HT4-B working FB, for many years.
I own a BC-939, but I've never attempted to use it.
I have the BC-614 speech amp, and this is what I've been using. The only
reason I'd like to have the HT5 is that it's what was originally used
with the rig.
My questions regarding the HT4-B are mostly motivated by the possibility
that there are some differences between it and the BC-610.
There are cosmetic differences, and the HT4 has one more meter. And,
possibly, the shelf with the socket for the air-padder cap.
73, Barrie, W7ALW
--
Bob - NØDGN
+------------------------------------------------------------------+
| \\"""// \\"""// |
| (@ @) Bob Bethman - NØDGN (@ @) |
+-------oOOo-(_)-oOOo--------------------------oOOo-(_)-oOOo-------+
| NØDGN AMRadio Manassas, VA | REAL Tube Radio and AM |
+-------------------------------+----------------------------------+
| Manassas Radio - Home of Homemade Kielbasa & Pirogi |
+-------------------------------+----------------------------------+
| Bob Bethman \\\|/// " The absence of a danger |
| rbethman(at)comcast.net \\ ~ ~ // signal does *NOT* mean |
| (/ @ @ /) that everything is OK " |
+-------------------------oOOo-(_)-oOOo----------------------------+
| <http://home.comcast.net/~rbethman> |
| 1 BC-61ØI w/BC-614I,1 T-213/GRC-26 w/BC614I,1 '51 Collins R-390A |
| SP-600/NR Type 159, Heath DX-60, Apache, Mohawk, SX-101, HT-32A |
+-------.oooO---Oooo.---------------------------.oooO---Oooo.------+
| ( ) ( ) ( ) ( ) |
| \ ( ) / \ ( ) / |
| \ _) ( _/ \ _) ( _/ |
+------------------------------------------------------------------+
| Amateur Astronomer - Celestron Nexstar 8 |
| 12" f5 Dob coming soon! Being built |
| Meade ETX-6Ø |
| 38 Deg 46'48.62"' N - 77 Deg 28'26.89" W |
+------------------------------------------------------------------+
| Opinions expressed are that of my own and do not necessarily |
| coincide with or represent those of ANYONE else |
+--------------------------.oooO---Oooo.---------------------------+
| ( ) ( ) |
| \ ( ) / |
| \ _) ( _/ |
|ALL E-mail received and sent scanned by AVG & Norton System Works |
+------------------------------------------------------------------+
______________________________________________________________
AMRadio mailing list
Home: http://mailman.qth.net/mailman/listinfo/amradio
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:AMRadio@mailman.qth.net
AMfone Website: http://www.amfone.net
AM List Admin: Brian Sherrod/w5ami
---
[This E-mail scanned for viruses by Declude EVA]
---
[This E-mail scanned for viruses by Declude EVA]
