Valve/tube car radio AM to FM conversion ideas?

On Jun 4, 6:40 pm, "JA" <formula1vhs@ TOGLIMI hotmail.com> wrote:
hi guys!
I need to have an obsolete 2708 eprom programmer-reader..
It's very difficult to find modern eprom programmers that do this!
I have buyed a willeim but it does everithing but 2708!!
Well if it's possible i would make one.
I'm very good skinned as electronic handy man , but i can't know how to make
it.
Can someone help me?
And if someone got an old eprom programmer let me know!
Click to expand...
The old Needhams PB10 programmer will work but requires an ISA slot on
the computer so newer computers can not be used for the PB10. I ran
into a similar situation but was trying to read and program 1702A
eproms. I ended up getting a Data I/O model 29B programmer (think the
model 22 will work too) on ebay. The programmers were cheap but if
getting them on ebay buyer beware. Anyway the Data I/O 29 and 22's
will read and program the 2708 and others provided that you have the
correct personality module. My 29B has the Unipack which has sevaral
different sockets that allow me to read various chips. You have to
set up the programmer for the chip you are reading and then put it in
the correct socket. If your computer has a serial port then you can
upload the hex file for the chip that you just read to your computer
and program other chips. If that is not an option then you might read
the 2708 then program a newer chip (like a 2716) and then read that on
a programmer that does talk to your computer as 2716 programmers were
very popular as DIY projects in the late 70's and through the 80's and
most programmers read the 2716 and up.

I hope that helps.
 
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Already available here:

http://www.agtannenbaum.com/h_cat.html#HEATHKIT
 
On 7 Juni, 19:17, Meat Plow <m...@petitmorte.net> wrote:
On Sat, 07 Jun 2008 11:07:26 +0100, Tim Phipps wrote:
Meat Plow wrote:

Do you remember looking at the 4-63 volt, 3300uf caps in your 700D? I just
replaced the banana jack on mine and those 4 caps looked like the tops
were puffed. I pulled the top off one and there is a convexed steel cap
over the actual can under the heat shrink that makes these look domed. And
they appear also to run pretty warm discoloring the white glue used to
bond them to the pcb. The amp works fine otherwise and I've never had any
problems with it. It was formerly used to power A/V sub-woofers and had
been left on continuously for a couple years. Next trip to the electronics
shop will probably yield a new set just for my piece of mind.  

I was beginning to think my posts were not making it out there until I
saw your reply (Arfa was right about the Virgin Media news server being
troublesome!)

I don't remember looking closely but I don't think they were
particularly domed.  It was at least 2 years ago when it died.  I do
remember that everything looked very clean in there.  The amp had an
easy life in a church install but for some reason the power transformer
got shorted on the primary thus blowing the mains fuse every time.
Since it was a custom part I enquired with Toroid International about
purchasing a replacement but it would have cost about Ł150 as I guess
they were not making these in volume any more.  When I saw that I could
just replace the whole amp for the same money it was a no-brainer.

One reason I like the 700D is that the cooling system is efficient and the
fan had infinite control. It is as quiet as a mouse until you started to
drive it. It also draws fresh air directly through the front through a
foam cell filter and through a heat sink tunnel and doesn't expose the
entire amp to forced air dust and other contaminates. Mine suffered a fall
while in a rack which broke the A channel banana jack off or I wouldn't
have ever noticed those 4 caps. They're not big enough physically to be
for rail currents so they must serve some other purpose in the driver
stage?? Here is a recent pic of my 700D in the rack that fell over. Lucky
all the other equipment wasn't in the rack when it fell backwards.

http://i273.photobucket.com/albums/jj220/meatplow1/music/CIMG0259.jpg

Below the Crown amp is a rare Sound Code Systems 2350A MOS-FET amp someone
gave me after they couldn't find anyone to repair it back in 1998. It
needed a new set of outputs 2SK134/2SJ49 TO3 case that had been
discontinued and unavailable at the time. I did find a set on the internet
and repaired the amp successfully. It's been used on and off as a source
for 18" subs in a tri-amped band PA setup since then without any problems.
It too is a quiet amp having a similar cooling system to the 700D. It's
heat sink includes a bristled radiator which is unique.- Dölj citerad text -

- Visa citerad text -
Click to expand...
The Mackie amp was repaired. A tiny tiny pcb trace/via hole for one of
the predrivers were open circuit.
This happened probably when the drivers shorted. Now everything's
OK!

Regards
 
There's something very strange I just came across.

One eBay member whose ID I won't make public here has a 53 Feedback rating,
100 percent positive.

But looking at his Feedback listings, 6 out of those 53 people he either
bought from or sold to who gave him Feedback are now "no longer registered
users", a.k.a. have had their accounts suspended.

I had emailed him about shipping on one of his auctions and received
a reply only long after the auction closed, on June 2. I presume that
emailing via the eBay form would include some information on my address
so he could calculate shipping if needed, in other words, contact
information that might be used to try to open a new account.

And for those saying it was phishing again, there were no links in the email.

Contact me off this forum if you'd like more details.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.
 
On Sat, 7 Jun 2008 09:45:05 -0700 (PDT) daviddschool
<daviddschool@gmail.com> wrote:

I am looking for a non-soldering way of attaching flexible wire to a
LED leg - I know I could wrap it, but I think it time it might come
loose or the connection might not be the greatest - has anyone come
out with a product that will work so if I wanted to change the LED, it
would be easy to attach the new one without soldering it?
Click to expand...
There are sockets for LEDs, but the company's name escapes me at the
moment.

-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
-----------------------------------------------
 
Sam Goldwasser wrote:

For me, I do eBay for fun. It's not like a day job so being kicked off
for a few days may be a good thing. Other than the time I've spent
trying to communicate with the droids and writing up the saga, it gives
me more time for other things.
Click to expand...

Did you ever use that old six pin Amphenol connector I sent you?


--
http://improve-usenet.org/index.html

If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm

Sporadic E is the Earth's aluminum foil beanie for the 'global warming'
sheep.
 
I am now working an ONKYO TU-D1. It is a funny little machine with CD
and Casette player.
I understand that Audio is wireless transmitted via IR to active
speakers.
As the unit has FM/AM controls I am curious to learn how that is
handled by this unit as I could not locate any Tuner or Antenna input.
Am I missing another component?
What could be the function of the multipin connector marked CONTROL?

Have a nice day
Brasto
 
Eeyore wrote:
I don't know who is making these T.amps for Thomann but they seem to be
pretty decent.

I've seen those. Maybe I'll get to find out who it is.


I haven't opened mine to look but I've heard some say
that they are copies of an old Crest design.

I doubt that on account of the fact that Crests are massively overengineered as a rule
(nhence expensive to build). Far more likely another QSC ripoff. If the output
transistors' collectors are grounded it's almost a dead cert.

Graham
Click to expand...
FYI it's these ones I'm talking about. I've also seen them branded as
Audiohead and C-mark.

http://www.thomann.de/gb/t-amp_ta2400.htm

--
Tim Phipps

replace "invalid" with "uk" to reply by email
 
This is a final report on this problem.

I believe it was actually the solder connections to the PCB and not the
relay contacts themselves.

Kenwood actually provided easy acces to the bottom of the PCB. A large
square section was partially punched out with only 4 thin metal strips
holding it in place. So, cutting two on one side allowed the relevant
part of the botton plate to be swung out of the way exposing everything
but the AC line circuitry.

When duplicating the erratic behavior, gently touching one of the relay
pins would make the sound come and go. While there was no visible crack,
the relay's solder terminals are physically the stationary
contacts. So, the constant pounding over the years must have loosened
at least one of them just enough to make marginal contact with the solder
on this single-sided PCB.

I removed the relay entirely and inspected the interior. The contact points
were in perfect condition with no sign of wear or burning.

After reinstalling the relay, the receiver has been 100 percent reliable.

Thanks to all who replied.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.
 
On Sun, 8 Jun 2008 15:06:21 -0700 "William Sommerwerck"
<grizzledgeezer@comcast.net> wrote:

Amp? Amphenol or Cinch maybe?

Berg.

Alban or Gertrude?
Click to expand...
;-)

-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
-----------------------------------------------
 
On Jun 7, 7:31 pm, Sam Goldwasser <s...@plus.seas.upenn.edu> wrote:
As a followup. My account was restored around noon today (June 7) with
the following statement:
Click to expand...

Ebay doesn't address you by your ebay name, but by your given name. I
think you've been Phished. Sign onto ebay, and immediately change
your password. I get these emails all the time, and report them as
spam.
 
On Jun 7, 7:31 pm, Sam Goldwasser <s...@plus.seas.upenn.edu> wrote:
As a followup. My account was restored around noon today (June 7) with
the following statement:
Click to expand...

Ebay doesn't address you by your ebay name, but by your given name. I
think you've been Phished. Sign onto ebay, and immediately change
your password. I get these emails all the time, and report them as
spam.
 
Jeff Liebermann wrote:
On 06 Jun 2008 22:40:43 -0400, Sam Goldwasser
sam@plus.seas.upenn.edu> wrote:


I will be updating this as it plays out. I expect the outcome to be
satisfactory, but the route it's taking is like one of those nightmares
where you're trapped on a 15 dimensional mobius strip. :)


You may soon have another way to contact and possibly yell at eBay.
They just sent me an "invitation" email annoucing:

===========================================
Coming June 16: eBay Phone Support
===========================================
* * * * * * * * * * * * * * * * * * * * * * * * * * *
We don't give our number to just anyone (except you)
* * * * * * * * * * * * * * * * * * * * * * * * * * *
Get access to eBay Phone Support:

Only invited members like you will be able to call our new number.
To access this faster service, you'll need to set up a PIN in My
eBay. Also be sure to add your current phone number to your profile.

Then, you'll be all set to go on June 16.

For some unknown reason, I guess it's a big secret. If you didn't get
an "invitation" I guess you're on eBay black list. My guess(tm) is
that I'll end up talking to a humanoid robot, reading from a script,
and talking in boilerplate. Kinda like a verbal version of your email
exchange with eBay support.

I got that same email. I assumed it was another fraud scheme and
Click to expand...
erased it. I only respond to ebay messages which come up on "my ebay"
after I've logged in to ebay. I NEVER to messages sent by email if they
have any "click buttons" to redirect or download information. Anyone
can send email and make it look like it came from any URL by name or IP
number. Yes, ebay security sucks, but it's probably no worse than
shopping at the average mall. You can get pickpocketed there too.
That said I only buy on ebay and have over 1000 transaction. So far
I've saved a lot more than I lost on a few bum deals. I the seller says
"untested" or "as is" you can be sure equipment is junk.
 
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On Sun, 08 Jun 2008 21:16:46 -0700, Louis Boyd
<boyd@apt0.sao.arizona.edu> wrote:

I got that same email. I assumed it was another fraud scheme and
erased it.
Click to expand...
Assumption, the mother of all screwups.

It's apparently for real. I verified that the email header looked
correct. I checked that the URL pointed to ebay.com and not somewhere
else. There was also a copy of the message in my eBay Message
mailbox. Good enough for me.

I read the instructions and manually went to My Account to register
the PIN number. Unless I totally screwed up, the procedure looked
correct. However, I'll have to wait 8 days to see if it works. So
far, eBay has not sent me a telephone number to use. I can't wait to
unload my frustrations on whomever will answer and pretend to listen.



--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
 
Jana, Since the TV is not working would you take any boards out and
repair. Or are most of the components SMT. In what area would you look
for this problem.
Thanks Hobbs
 
"Timelord" <timelord@cpbbs.synchro.net.remove-zgb-this> writes:

"Sam Goldwasser" <sam@plus.seas.upenn.edu> wrote in message
news:6w63smarx0.fsf@plus.seas.upenn.edu...
I have been a member in good standing with eBay since 1999. As readers
of Sam's Laser FAQ are probably aware, I have acquired a large number of
lasers and related items on eBay, most at bargain basement prices. All in
all I have been very satisfied with the eBay experience. Until now.

For a blow-by-blow saga of what I'm experiencing now, please go to

http://repairfaq.cis.upenn.edu/Misc/ebayhorror1.htm

I will be updating this as it plays out. I expect the outcome to be
satisfactory, but the route it's taking is like one of those nightmares
where you're trapped on a 15 dimensional mobius strip. :)

Comments welcome!

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above
is
ignored unless my full name AND either lasers or electronics is included
in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.

Hi Sam,

Well I have gotten a lot of those my self however I don't have an Ebay
account (LOL)
I am afraid that you have gotten caught by the Ebay Proxy letter. It is sent
with the intent
to be able to intercept your PayPal username and password that gives the
sender the chance
to empty your account....

You should change your password right now!!! but other wise ignore it as
Ebay did not send it. I could tell you for sure if I had a copy of your
letter ( The first one ).
Click to expand...
Has anyone actually read what I wrote in the linked page? :)

Every email I received from eBay was also present in "My Messages" on
"My eBay". And my account had indeed been suspended *before* I contacted
eBay about this mess.

Now is it possible I replied to some email awhile ago that triggered this?
I suppose it's possible, but highly unlikely.

This was not a phishing scheme, at least not one from outside eBay.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.
 
On Mon, 09 Jun 2008 10:24:03 -0500, me wrote:

My brother has a nice 27" tube TV (flat screen) that
has gone bad. The unit is only abt 6 years old.

They were watching it Sat night and the picture shrank
down to one thin horizontal line that stretches across
the screen. In other words. it has no vertical scanning
I think.

He said I could have this TV if I wanted it but I live
in a rural area and no where to take it to have it
fixed!

So.... questions:

1. What is the part that has failed in this set given
its symptoms?

2. Is it worth fixing it? If yes, where can I get the
part and could I install it myself?
Click to expand...
Have you ever repaired electronics and do you have any idea at all of what
circuits do what inside a tv?
 
On 09 Jun 2008 08:14:06 -0400, Sam Goldwasser
<sam@plus.seas.upenn.edu> wrote:

Actually, I've had rather good experience with "untested" and "as-is".
Click to expand...
Same here. If I want one of something old, I'll usually buy three of
them for parts. For example:
<http://802.11junk.com/jeffl/pics/home/slides/BL-shop5.html>
There are 3ea Wavetek/SSI 3000B service monitors and 3ea HP 8620A
sweepers. Similarly, I also have 3 almost identical frequency
counters, RF generators, and assorted oscilloscopes. I find it better
to have the spare parts than to have one "tested and calibrated"
overpriced piece of test equipment. My guess is that I've bought
about 150 assorted pieces of test equipment on eBay over the years.
Perhaps 3-5 were not quite what the vendor was advertising. I had
one complex hassle when an allegedly working frequency counter arrived
displaying error messages. I really wanted it, so I just downloaded
the manual and fixed it myself.

However, as-is and untested is not for everyone. I actually enjoy
fixing things which makes such purchases practical. For example, all
3 of the HP 8620 sweep generators came with very sticky controls and
knobs. The grease had dried out in the controls and was adding
considerable friction. I tore the front panel apart, lubed
everything, and all the knobs now move like new. If one can't do
simple repairs like that, as-is and untested is not a good idea.



--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
 
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