Re: TR-4C INRAD #1901 & #1902
The TR-3 filter were balanced while the TR-4 are the more common unbalanced in and out. 120 ohms if my memory is good. ?I updated my TR-4C to the wider filters.?
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On Mar 23, 2024, at 7:44 AM, Steve Wedge, W1ES/4 via groups.io <w1es@...> wrote:
?
An alternate way of getting a Drake transceiver with nice audio response is to use a TR-3.? Those old 4-pole filters have a more gradual slope in their passbands.
Of course, you give up sidetone on CW with this option.
I found the tube PTO to be stable, once the set warms up.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
On Saturday, March 23rd, 2024 at 9:19 AM, Chris - WX7V <chrislwhite93@...> wrote:
Last week I had contacted Frank?WB2UJS at Noble over email.? He said that he does not may any filters or?accessories for the TR4's.? His advice was to find someone selling off one as parts from an old unit (soon
we'll run out of old units -- hi hi).
It would be very nice to find a supply of these replacement filters!
73,? Chris de WX7V
?
|
Re: TR-4C INRAD #1901 & #1902
Yeah, there simply isn't enough demand for those filters.
If enough people were to ask it might change.?
There's not a lot of money in making modern "stuff" for old "stuff" unless there's a LOT of old stuff out there that people are willing to spend money on.!
--
73/Rick
W4XA
*Every post is created using Linux
|
You really don't have to paint the holes... Barry - N4BUQ
The good thing about painting the PS/Speaker cabinet, is that you don't have to deal with the 95,392 holes punched in it that are found in the other cabinets! John K5MO
On Fri, Mar 22, 2024 at 9:59?PM Stan Gammons via <buttercup11421= [email protected]> wrote: I've made some progress on the AC-4, MS-4, T-4X and R-4B projects. I
installed the Heathkit Shop upgrade kit in the AC-4.? New speaker in the
MS-4.
Today was a nice day in 4 land, so I sanded the cabinet with some 40
grit sandpaper using the orbital sander.? While not "perfect" I think it
will be good enough after some sanding with finer grit sandpaper.? Will
have to wait for warmer and less humid days to paint the cabinet.?
Cabinets on the T-4X and R-4B are good enough I'm not going to mess with
re-painting them.
T-4X seems to be in good shape.? Only bands I've tried are 80 and 40
meters. It puts out 100 watts or so IF the ancient RS meter I currently
have on the bench is accurate.
Undecided on the R-4B.? It receives well. I can hear WWV on 15 Mhz with
about 10 ft of wire laying on floor. Also receives FT8 well on 80, 40,
20 and 15 meters using the same piece of wire for an antenna. Unsure if
there's a problem with the AVC like another member of the group has with
his R-4B.? I have -1.35 volts on TP2. But, the S meter sensitivity pot
is fully counter clockwise to get 40 DB on the meter when adjusted per
the instructions in the manual. R89 and R41 are both within tolerance.?
Still on the to do list is installing the Hayseed Hamfest caps in the
R-4B.? That looks to be "fun"??? Not nearly as much "fun" as installing
a plug-in relay in a T-4X though...? Been there and done that.
Unfortunately this T-4X doesn't have a plug-in relay.
73
Stan
KM4HQE
|
Re: TR-4C INRAD #1901 & #1902
An alternate way of getting a Drake transceiver with nice audio response is to use a TR-3.? Those old 4-pole filters have a more gradual slope in their passbands.
Of course, you give up sidetone on CW with this option.
I found the tube PTO to be stable, once the set warms up.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
On Saturday, March 23rd, 2024 at 9:19 AM, Chris - WX7V <chrislwhite93@...> wrote:
Last week I had contacted Frank?WB2UJS at Noble over email.? He said that he does not may any filters or?accessories for the TR4's.? His advice was to find someone selling off one as parts from an old unit (soon we'll run out of old units -- hi hi).
It would be very nice to find a supply of these replacement filters!
73,? Chris de WX7V
?
|
Stan, be sure to see the article on Ron's site about getting the textured finish.? It's fairly easy to do but takes a little finesse.? You basically use satin black spray paint and drill a small hole in a nozzle to enlarge it and make it spatter.? I hold the can a couple of feet away and give it a light spray.? That's usually enough for the desired result.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
On Saturday, March 23rd, 2024 at 9:01 AM, John K5MO <johnk5mo@...> wrote:
The good thing about painting the PS/Speaker cabinet, is that you don't have to deal with the 95,392 holes punched in it that are found in the other cabinets!
John K5MO
On Fri, Mar 22, 2024 at 9:59?PM Stan Gammons via <buttercup11421= [email protected]> wrote: I've made some progress on the AC-4, MS-4, T-4X and R-4B projects. I
installed the Heathkit Shop upgrade kit in the AC-4. New speaker in the
MS-4.
Today was a nice day in 4 land, so I sanded the cabinet with some 40
grit sandpaper using the orbital sander. While not "perfect" I think it
will be good enough after some sanding with finer grit sandpaper. Will
have to wait for warmer and less humid days to paint the cabinet.
Cabinets on the T-4X and R-4B are good enough I'm not going to mess with
re-painting them.
T-4X seems to be in good shape. Only bands I've tried are 80 and 40
meters. It puts out 100 watts or so IF the ancient RS meter I currently
have on the bench is accurate.
Undecided on the R-4B. It receives well. I can hear WWV on 15 Mhz with
about 10 ft of wire laying on floor. Also receives FT8 well on 80, 40,
20 and 15 meters using the same piece of wire for an antenna. Unsure if
there's a problem with the AVC like another member of the group has with
his R-4B. I have -1.35 volts on TP2. But, the S meter sensitivity pot
is fully counter clockwise to get 40 DB on the meter when adjusted per
the instructions in the manual. R89 and R41 are both within tolerance.
Still on the to do list is installing the Hayseed Hamfest caps in the
R-4B. That looks to be "fun" Not nearly as much "fun" as installing
a plug-in relay in a T-4X though... Been there and done that.
Unfortunately this T-4X doesn't have a plug-in relay.
73
Stan
KM4HQE
|
Re: TR-4C INRAD #1901 & #1902
Last week I had contacted Frank?WB2UJS at Noble over email.? He said that he does not may any filters or?accessories for the TR4's.? His advice was to find someone selling off one as parts from an old unit (soon we'll run out of old units -- hi hi).
It would be very nice to find a supply of these replacement filters!
73,? Chris de WX7V
?
|
The good thing about painting the PS/Speaker cabinet, is that you don't have to deal with the 95,392 holes punched in it that are found in the other cabinets!
John K5MO
On Fri, Mar 22, 2024 at 9:59?PM Stan Gammons via <buttercup11421= [email protected]> wrote:
I've made some progress on the AC-4, MS-4, T-4X and R-4B projects. I
installed the Heathkit Shop upgrade kit in the AC-4.? New speaker in the
MS-4.
Today was a nice day in 4 land, so I sanded the cabinet with some 40
grit sandpaper using the orbital sander.? While not "perfect" I think it
will be good enough after some sanding with finer grit sandpaper.? Will
have to wait for warmer and less humid days to paint the cabinet.?
Cabinets on the T-4X and R-4B are good enough I'm not going to mess with
re-painting them.
T-4X seems to be in good shape.? Only bands I've tried are 80 and 40
meters. It puts out 100 watts or so IF the ancient RS meter I currently
have on the bench is accurate.
Undecided on the R-4B.? It receives well. I can hear WWV on 15 Mhz with
about 10 ft of wire laying on floor. Also receives FT8 well on 80, 40,
20 and 15 meters using the same piece of wire for an antenna. Unsure if
there's a problem with the AVC like another member of the group has with
his R-4B.? I have -1.35 volts on TP2. But, the S meter sensitivity pot
is fully counter clockwise to get 40 DB on the meter when adjusted per
the instructions in the manual. R89 and R41 are both within tolerance.?
Still on the to do list is installing the Hayseed Hamfest caps in the
R-4B.? That looks to be "fun"??? Not nearly as much "fun" as installing
a plug-in relay in a T-4X though...? Been there and done that.
Unfortunately this T-4X doesn't have a plug-in relay.
73
Stan
KM4HQE
|
Jim, Sometime when you get a chance I would love to see pictures of your spark gaps. 73 -Jim NU0C On Thu, 21 Mar 2024 03:26:36 -0700 "Jim VE7RF" <jim.thom@...> wrote: Ok, this is where my hb adjustable spark gap pays off.? ?One across the tune cap...protects the tune cap and the bandswitch.? ?2nd one is across the load cap.
|
Re: TR-4C INRAD #1901 & #1902
Hi Sean,
About 5 years or so ago, I acquired a TR-4C and did the very same thing with it replacing the original filters with the INRAD #1901 & #1902 filters!
While I also get pretty good audio reports due to the slightly wider response,? The receive audio is much easier on the ears too!?
(I even have the INRAD AM filter for the TR-6)
I have been thinking about installing the Noble 2.8kHz filter in my R-4C to improve the received audio.
Since they make filters for the R-4C & TR-7 (even custom bandwidth)? if enough people showed interest, they might be willing to make filters for the TR-4 series of radios too!
73/Rick
W4XA
*Every post is created using Linux
|
I've made some progress on the AC-4, MS-4, T-4X and R-4B projects. I
installed the Heathkit Shop upgrade kit in the AC-4.? New speaker in the
MS-4.
Today was a nice day in 4 land, so I sanded the cabinet with some 40
grit sandpaper using the orbital sander.? While not "perfect" I think it
will be good enough after some sanding with finer grit sandpaper.? Will
have to wait for warmer and less humid days to paint the cabinet.?
Cabinets on the T-4X and R-4B are good enough I'm not going to mess with
re-painting them.
T-4X seems to be in good shape.? Only bands I've tried are 80 and 40
meters. It puts out 100 watts or so IF the ancient RS meter I currently
have on the bench is accurate.
Undecided on the R-4B.? It receives well. I can hear WWV on 15 Mhz with
about 10 ft of wire laying on floor. Also receives FT8 well on 80, 40,
20 and 15 meters using the same piece of wire for an antenna. Unsure if
there's a problem with the AVC like another member of the group has with
his R-4B.? I have -1.35 volts on TP2. But, the S meter sensitivity pot
is fully counter clockwise to get 40 DB on the meter when adjusted per
the instructions in the manual. R89 and R41 are both within tolerance.?
Still on the to do list is installing the Hayseed Hamfest caps in the
R-4B.? That looks to be "fun"??? Not nearly as much "fun" as installing
a plug-in relay in a T-4X though...? Been there and done that.
Unfortunately this T-4X doesn't have a plug-in relay.
73
Stan
KM4HQE
|
Re: Dumb question of the day.
I found one of those at a hamfest. Unfortunately, the inside was completely trashed, as was the meter movement, and I tossed it. I did get a nice leather case out of the deal.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with Proton Mail secure email.
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On Friday, March 22nd, 2024 at 1:33 PM, jerry-KF6VB <jerry@...> wrote: On 2024-03-17 11:34, Paul Christensen wrote:
Nice find on the Fluke 289. Even on the used market they're quite
expensive. RCA WV-98C is the go-to VTVM here.
Triplett made a really nice FET analog VOM, the model 603. It's
roughly the same case size as a Simpson 260. They're scarce but well
worth the search. It came standard from Triplett with a rugged 1M
probe. *** I've got one of those. Hiding in the junk somewhere. Scored it at
the ham swap
for a whopping $10. INOP. I cleaned up the connectors, replaced the
multitude of
batteries - still INOP. The construction inside is daunting.... LOTS of
stacked
switches and connectors. Tightly packed.
I do like the idea of a ground-loop-proof battery powered VTVM.
- Jerry, KF6VB
|
TR-4C INRAD #1901 & #1902
I have a TR-4Cw w/rit with the #1901 and #1902 filters, bringing the SSB bandwidth to 2.5KHz (vs the 2.1KHz stock).?
Also have a TR-4Cw (w/o rit) with stock SSB filters. I get *much better transmit audio reports on the unit with the wider bandwidth. Sure wish I could find another pair of these filters so the two transceivers could sound equivalent. I know INRAD discontinued them some time ago.
I know this is a *LONG SHOT*, but I don¡¯t suppose anyone has any they¡¯d be willing to sell?
Worth a try ? 73 KK6BEB?
|
Drake MN7 Tuner Chassis Paint.
The Drake MN7 I intend to sell along with some other peripherals is in bad need of a paint job. Not necessarily scratched up but just worn and faded.
I do not get along with paint very well. And my dexterity is failing me. But looking for recommendations on paint and technique?? Or should I sell as is? But fully operational of course.
I will also have a TR7 for sale. And:
RV-7 Remote VFO
MS-7 Speaker
MN-2700 Matching Network
Drake CW75 Electronic Keyer
Drake TV-1000-LP Low Pass Filter
Thanks
73
Bill
W4WCS
?
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Re: Drake MN7 Tuner Knobs
Update,
I purchased the knob from:
As recommended by w9gb. Thank you Sir!
73
Bill
W4WCS
|
Re: Dumb question of the day.
On 2024-03-17 11:34, Paul Christensen wrote: Nice find on the Fluke 289. Even on the used market they're quite
expensive. RCA WV-98C is the go-to VTVM here.
Triplett made a really nice FET analog VOM, the model 603. It's
roughly the same case size as a Simpson 260. They're scarce but well
worth the search. It came standard from Triplett with a rugged 1M
probe.
*** I've got one of those. Hiding in the junk somewhere. Scored it at the ham swap for a whopping $10. INOP. I cleaned up the connectors, replaced the multitude of batteries - still INOP. The construction inside is daunting.... LOTS of stacked switches and connectors. Tightly packed. I do like the idea of a ground-loop-proof battery powered VTVM. - Jerry, KF6VB
|
I have a TO-6 and it¡¯s a great cap tester! ?It will give you quantitative results for leakage and can measure insulation resistance on non-electrolytics as well.?
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
On Thu, Mar 21, 2024 at 20:23, jerry-KF6VB < jerry@...> wrote: On 2024-03-21 01:12, Michael Jensen wrote:
>
>>
>> The Drake AGC circuit is very high impedance: on the order of
>> megohms.
*** This high impedance stuff can be confusing. My KWM-2 had a thing
where
it would take a second or two to switch from transmit to receive.
Turned out
to be a leaky capacitor in the very high impedance T/R circuit. The
leaky-ness
was so small that the cap looked just fine on all my capacitor testers,
including
an old Heathkit. I have since acquired a Sprague TO-6, and I think that
one might have
found it.
- Jerry, KF6VB
|
Re: R-4C Frying Egg/Static Noise
No that is NOT normal. ?Rob, NC0B
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On Mar 21, 2024, at 6:39?PM, Kevin W2TVS via groups.io <johnlamondwyrk@...> wrote:
?Just had my R4A restored by WB4HFN and it gives you S9 to 20 over static when you first turn it on. ?It lasts for about one to two minutes and then goes away. ?I think this is normal for these radios. Once it warms up, then it is fine.
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Re: R-4C Frying Egg/Static Noise
I don't think its "normal" for any radio. Lets see what others with this set have to say. Sounds to me like something heat sensitive. Maybe even a bad solder joint. Since it starts when the set is cold perhaps freeze mist after warm up would find it. Turning a can of canned air upside down works pretty well as freeze mist. For a bad solder joint or cracked resistor poking the circuit with an insulated stick might find it. Not normal.
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On 3/21/2024 5:38 PM, Kevin W2TVS via groups.io wrote: Just had my R4A restored by WB4HFN and it gives you S9 to 20 over static when you first turn it on. ?It lasts for about one to two minutes and then goes away. ?I think this is normal for these radios. Once it warms up, then it is fine.
--
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998
|
Re: R-4C Frying Egg/Static Noise
Just had my R4A restored by WB4HFN and it gives you S9 to 20 over static when you first turn it on. ?It lasts for about one to two minutes and then goes away. ?I think this is normal for these radios. Once it warms up, then it is fine.
|
On 2024-03-21 01:12, Michael Jensen wrote:
The Drake AGC circuit is very high impedance: on the order of
megohms.
*** This high impedance stuff can be confusing. My KWM-2 had a thing where it would take a second or two to switch from transmit to receive. Turned out to be a leaky capacitor in the very high impedance T/R circuit. The leaky-ness was so small that the cap looked just fine on all my capacitor testers, including an old Heathkit. I have since acquired a Sprague TO-6, and I think that one might have found it. - Jerry, KF6VB
|
Rob Sherwood
Chris - WX7V
Jim Shorney
Bill
Kevin W2TVS